Free Online Calculators & Tools
653 fast, free tools — calculators, converters and image tools. No sign-up, no downloads, works on your phone.
No tools match — try another word.
Calculators for everyone
RupayaTools is a free set of online calculators. Checking your monthly in-hand salary? Estimating cement and bricks for a new house? Planning a mutual fund SIP? Each tool gives you an answer in seconds — with number formatting that matches how you read, and the rules that actually apply here.
All 653 tools run entirely in your browser. Nothing to install, no account to create, and no personal data leaving your device. The site is lightweight and mobile-friendly, so it works just as well on a phone as on a desktop.
Salary tools break down your CTC, estimate take-home pay, and work out gratuity and HRA tax benefits. Construction tools estimate concrete, cement, sand, bricks and full project cost the way Indian sites measure them. Finance tools cover SIP growth, loan EMIs, fixed deposits, PPF, investment returns, GST and income tax under the old and new regimes.
Pick any tool below — results update instantly as you type, and everything is free forever.
Salary Calculators
Salary Calculator
Break down your CTC into basic, HRA, allowances and deductions.
In-Hand Salary Calculator
Estimate your monthly take-home pay after PF, ESI and tax.
Gratuity Calculator
Compute gratuity payable under the Payment of Gratuity Act.
HRA Calculator
Calculate HRA exemption and tax saving on your house rent.
Construction Calculators
Concrete Calculator
Estimate cement, sand and aggregate for slabs, beams and columns.
Brick Wall Calculator
Work out bricks, cement and sand needed for any wall.
Cement Calculator
Find how many cement bags your concrete mix requires.
Bricks Calculator
Estimate the number of bricks for walls of any size.
Construction Cost Calculator
Get a quick cost estimate for your building project.
Finance Calculators
SIP Calculator
Project mutual fund SIP growth with expected returns.
EMI Calculator
Calculate loan EMI, total interest and total repayment.
FD Calculator
Estimate the maturity value of your fixed deposit.
PPF Calculator
Project your Public Provident Fund corpus and interest.
CAGR Calculator
Measure the annual growth rate of your investments.
GST Calculator
Add or remove GST and split CGST and SGST amounts.
Income Tax Calculator
Compare old vs new regime tax on your salary income.
Biweekly Mortgage Calculator
See how biweekly payments shorten a mortgage and save interest.
Future Value Calculator
See what a lump sum plus monthly contributions grows to over time.
Credit Card EMI Calculator
Turn a credit-card purchase into monthly installments — EMI, total interest, and a full amortisation table.
Income Tax Slab Calculator
Calculate tax by brackets with the 2026 preset or your own editable slabs, for any filing status.
RD Calculator
Plan a recurring deposit or regular monthly savings — maturity value, interest earned, and growth chart.
Stamp Duty Calculator
Work out property stamp duty for the UK, Australia, India, or any custom rate — with a full breakdown.
Leave Encashment Calculator
Calculate the payout for unused leave days from your salary, with a tax deduction and net amount.
ROI Calculator
Measure the return on any investment in dollars and percent.
Gold Price Calculator
Price gold by karat and weight, and value scrap gold, with an editable spot price.
Net Worth Calculator Online
Add up your assets and debts to find your net worth in seconds.
NPV Calculator
Value a project by its discounted cash flows, with a rate chart.
IRR Calculator
Find the internal rate of return of an investment, with a cash-flow table.
Savings Goal Calculator
Work out the monthly saving needed to reach any target amount.
Emergency Fund Calculator
Find how many months of expenses your emergency fund should cover.
Loan Prepayment Calculator
See how extra payments cut interest and shorten a loan.
Credit Card Interest Calculator
Work out credit-card interest and payoff time from balance and APR.
Stock Average Calculator
Average down a stock position and find the new break-even price.
VAT Calculator
Add or remove VAT from any price, with the tax split shown.
APR Calculator
Find the true annual percentage rate of a loan, with monthly payment.
Break Even Calculator
Find your break-even point in units and revenue from costs and price.
Capital Gains Calculator
Work out your total gain, per-share gain, and return on any sale.
Freelance Rate Calculator
Turn a target salary into hourly, daily, and project rates.
Hourly to Salary Calculator
Convert an hourly wage to an annual salary, with overtime.
Retirement Savings Calculator
See how your nest egg grows by retirement age, with contributions.
Annuity Calculator
Work out the future value of regular payments, with interest.
Dividend Calculator
Estimate dividend income and yield from shares you own.
Markup Calculator
Find markup, margin, and selling price from cost and profit.
Profit Percentage Calculator
Work out profit, loss, and margin on any sale.
Refinance Calculator
See if refinancing saves money — new payment, interest, and break-even.
Salary Hike (Raise) Calculator
Work out your new salary, hike amount, and percentage after a raise.
DSCR Calculator
Work out the debt service coverage ratio for a loan or property.
Cap Rate Calculator
Find the capitalisation rate and value of a rental property.
Crypto Profit Calculator
Work out profit, loss and return on any crypto trade.
Diamond Price Calculator
Estimate a diamond’s value from carat, cut, colour and clarity.
Loan Against Property Calculator
Work out EMI, interest and eligibility for a loan against property.
Silver Price Calculator
Find the value of silver by weight, purity and live price.
Churn Calculator
Find your customer churn rate, revenue churn, and average customer lifetime.
Debt Snowball Calculator
Pay off debts smallest-first and see your debt-free date.
Electricity Cost Calculator
Work out what your appliances cost to run each month.
Overtime Pay Calculator
Work out regular pay, overtime pay, and gross pay.
Purchasing Power Calculator
Use this free purchasing power calculator to see what your money will really be worth in the future.
Rent Increase Calculator
Work out a new rent after an increase, with caps and notice rules.
ARM Mortgage Calculator
Work out ARM payments with our free ARM mortgage calculator.
Balance Transfer Calculator
See how much a balance transfer saves you in interest.
Balloon Payment Calculator
Work out the monthly payment and balloon balance on a loan.
Construction Loan Calculator
Estimate interest-only payments during construction and the mortgage after.
Credit Card Minimum Payment Calculator
See how long minimum payments take to clear a card balance.
Credit Score Simulator
See how everyday actions could move your credit score up or down.
401k Calculator
Estimate how your 401(k) retirement savings can grow over time.
CD Calculator
See how much a certificate of deposit can earn by maturity.
IRA Calculator
Project how a traditional IRA can grow from yearly contributions.
Rental Yield Calculator
Work out gross and net rental yield with our free rental yield calculator.
Stock Profit Calculator
Find profit, ROI, and break-even price on any stock trade.
Take Home Salary Calculator
See your take-home pay after federal tax, FICA, and state tax, per paycheck.
Baby Cost Calculator
Estimate the first-year cost of a baby, month by month and in total.
Capital Gains Tax Calculator
Estimate tax on short-term and long-term capital gains with 2026 rates.
eBay Fee Calculator
Work out eBay final value and processing fees and your net proceeds.
Etsy Fee Calculator
Work out Etsy fees and your net profit per sale.
Freelance Tax Calculator
Estimate self-employment tax, income tax, and quarterly payments.
PMI Calculator
Find your LTV, down payment and monthly mortgage insurance.
401k Contribution Calculator
See your per-paycheck 401(k) contribution and employer match.
401k Withdrawal Calculator
Work out what a 401(k) withdrawal is worth after taxes and penalties.
529 Calculator
See how a 529 college savings plan can grow over the years.
Babysitting Rate Calculator
Work out fair babysitting pay from rate, hours, children, and evening multipliers.
Car Insurance Premium Calculator
Estimate your yearly car insurance premium from your car and profile.
Child Support Calculator
Estimate monthly child support from both parents' incomes.
Bike Insurance Premium Calculator
Enter your motorcycle's value, coverage type, rider age and experience to estimate your annual and monthly premium.
Cash on Cash Return Calculator
Work out your rental's cash on cash return with our free calculator.
Dropshipping Profit Calculator
Find profit per order and margin for a dropshipping product.
Electric Car Savings Calculator
Compare an electric car with a petrol car — fuel costs, savings and break-even.
Escrow Calculator
Work out your monthly escrow for taxes and insurance.
Estate Tax Calculator
Estimate federal estate tax and what heirs receive.
Federal Income Tax Calculator
Estimate your 2026 federal tax, taxable income and effective rate.
Flood Insurance Calculator
Estimate yearly flood insurance from your zone and coverage.
Health Insurance Premium Calculator
Estimate monthly health insurance premiums by age, plan tier, and state.
HOA Fee Calculator
Estimate monthly HOA dues itemised by expense, or as a percentage of home value.
Home Depreciation Calculator
Work out annual rental-property depreciation and the full schedule.
Home Insurance Calculator
Estimate homeowners insurance premiums by home value, risk, and deductible.
House Flipping Calculator
Estimate profit, ROI, and the 70% rule on a flip.
I Bond Calculator
Project I Bond growth from fixed and inflation rates.
Index Fund Return Calculator
Project index fund growth from contributions, returns, and fees over time.
Lease vs Buy Car Calculator
Compare leasing vs buying a car over the same period.
Lifetime Value Calculator
Work out customer lifetime value and the LTV to CAC ratio.
Mortgage Points Calculator
See if buying mortgage points pays off, and when.
Motorcycle Loan Calculator
Work out monthly payments, interest, and total cost for a motorcycle loan.
Pension Calculator
Estimate your yearly and monthly pension from salary and service.
Pet Insurance Calculator
Estimate monthly pet insurance premiums by pet type, age, size and coverage.
Photography Pricing Calculator
Price a photo session from your costs, time, and profit margin.
Quarterly Tax Calculator
Estimate your federal tax and split it into four quarterly payments.
Real Estate Commission Calculator
Work out agent commission on any home sale price.
Rental Property Calculator
Analyse a rental property’s cash flow, cap rate, and cash-on-cash return.
Restaurant Tip Calculator
Work out the tip, total bill, and each person's share.
Roth Conversion Calculator
Compare converting an IRA to Roth versus leaving it alone.
Salary Negotiation Calculator
Compare an offer with your current pay and find your counter range.
Security Deposit Calculator
Work out a security deposit and the refund after deductions.
Self Employment Tax Calculator
Work out the 15.3% self-employment tax on net earnings, with the deductible half.
SEP IRA Calculator
Work out your SEP IRA contribution and projected retirement balance.
Shopify Profit Calculator
Find profit per order and margin on Shopify after fees, shipping, and discounts.
Stripe Fee Calculator
Work out Stripe fees instantly with our free Stripe fee calculator.
Tax Refund Calculator
Estimate your federal tax refund (or amount owed) from income and withholding.
Total Cost of Ownership Calculator
Add up purchase price, fuel, insurance, maintenance and resale to find a vehicle's true cost.
Travel Budget Calculator
Plan a trip budget by category and see the total, per-person, and per-day cost.
Customer Acquisition Cost Calculator
Find your CAC from sales and marketing spend, plus payback and LTV ratio.
Water Bill Calculator
Estimate your monthly water bill from usage and rates.
Wedding Budget Calculator
Plan your big day with our free wedding budget calculator.
Everyday Tools
Number to Words
Convert numbers to words in Indian format — lakh and crore.
Age Calculator
Find your exact age in years, months and days.
Percentage Calculator
Quickly solve percent change, increase and decrease.
CGPA Calculator
Convert CGPA to percentage (CBSE ×9.5) and back.
Naam Japa Counter
Online mala counter — tap to count, auto-saves.
MM to Inches
Convert mm, cm, km to inches, feet and miles.
Tip Calculator
Split restaurant bills with tip, per person.
Time Duration Calculator
Exact duration between two date-times.
Body Fat Calculator
Estimate body fat % with a tape measure.
Unit Price Calculator
Which pack is really cheaper? Compare.
Percentage to CGPA Calculator
Convert % to CGPA (CBSE ×9.5).
QR Code Generator
QR codes for links, text, WiFi & contacts.
UPI QR Code Generator
QR codes for your UPI ID + amount.
JSON Compare – Find Differences
Diff two JSON objects, line by line.
Dice Roller
Roll 1–6 fair virtual dice.
Image & PDF Tools
Compress Image to 100KB
Shrink any photo to under 100KB.
Compress Image to 50KB
Shrink any photo to under 50KB.
Compress Image to 20KB
Shrink photos to under 20KB.
PNG to WebP Converter
Convert PNG to smaller WebP files.
Reduce Image Size in KB
Shrink images to any KB you pick.
JPEG to PNG Converter
Convert JPEG photos to PNG format.
Compress PDF to 200KB
Shrink PDFs toward 200KB.
Protect PDF with Password
Lock a PDF with AES-256 encryption.
Unit Converters
KM to Miles Converter
Convert km to miles, meters, yards and feet instantly.
CM to Inches Converter
Convert cm to inches, mm and feet — great for TV sizes.
CM to Feet Converter
Convert cm to feet and inches — handy for height on forms.
Feet to CM Converter
Convert feet to cm — handy for height on forms.
Feet and Inches to CM Converter
Convert height like 5'7" to cm instantly.
Nautical Miles to KM Converter
Convert nautical miles to km — for ships and flights.
Grams to KG Converter
Convert grams to kg — for kitchen and parcels.
KG to Grams Converter
Convert kg to grams — for recipes and diet plans.
Pounds to Stone Converter
Convert pounds to stone — the British weight unit.
Stone to KG Converter
Convert stone to kg — British weights in kilos.
Pounds to Ounces Converter
Convert pounds to ounces — 16 oz per pound.
Ounces to Pounds Converter
Convert ounces to pounds — for US recipes.
KG to Pounds Converter
Convert kg to pounds — gym, flights, shipping.
Kelvin to Celsius Converter
Convert kelvin to Celsius — for science class.
Fahrenheit to Kelvin Converter
Convert Fahrenheit to kelvin — physics made easy.
Kelvin to Fahrenheit Converter
Convert kelvin to Fahrenheit — labs and US weather.
Celsius to Kelvin Converter
Convert Celsius to kelvin — board exam essential.
MPH to KPH Converter
Convert mph to kph — car specs and movies.
Land Unit Converter (India)
Acre, bigha, guntha, sq ft — for land deals.
Kilowatt to Unit Converter (Electricity)
kW to electricity units + bill estimate.
Yards to Meters Converter
Convert yards to meters — and meters back to yards.
EUR to USD Converter
Convert euros to US dollars at the latest exchange rate.
Time Zone Converter
Convert times between time zones, including EST to IST and EST to PST.
Roman Numerals Converter
Convert numbers to Roman numerals and Roman numerals back to numbers.
Speed Distance Time Calculator
Solve for speed, distance, or time — any one of the three from the other two.
Fuel Efficiency Calculator
Find out how far your car really goes on a gallon or a litre.
Percent Off Calculator
Find the sale price and savings on any discount.
Grams to Cups Converter
Convert grams to cups for common ingredients, with densities.
Download Speed Calculator
Work out download times from file size and connection speed.
Hat Size Calculator
Find your hat size from a head measurement, in US, UK and cm.
Notice Period Calculator
Work out your last working day from a resignation date and notice period.
Quintal to Kg Converter
Convert quintals to kilograms, and kilograms to quintals.
Miles to Steps Calculator
Convert miles walked or run into steps, with stride length.
Fuel Cost Calculator
Work out fuel cost, gallons used, and total for any trip.
Bandwidth Calculator
Work out download time from file size and connection speed.
Data Usage Calculator
Estimate monthly GB from streaming, calls, browsing, and gaming.
Hex to RGB Converter
Convert hex to RGB and HSL, with a live color preview.
Military Time Converter
Convert 24-hour military time to 12-hour AM/PM time, and back.
Week Number Calculator
Find the ISO week number and date range for any date.
Age Difference Calculator
Find the exact age gap between two people or dates.
Amps to Watts Calculator
Convert amps to watts with voltage, and watts back to amps.
Months Between Dates Calculator
Count full months and days between any two dates.
Speed Calculator
Find speed, distance, or time from the other two.
Steps to Miles Calculator
Convert steps to miles or kilometres from your stride length.
PPI Calculator
Find pixels per inch of any screen from resolution and size.
Hijri Calendar Converter
Convert dates between the Hijri and Gregorian calendars.
Prayer Time Calculator
Find daily prayer times for any location and date.
Battery Life Calculator
Estimate how long a battery lasts for any device and load.
Clothing Size Converter
Convert clothing sizes between US, UK, EU and international charts.
Ring Size Calculator
Find your ring size from diameter, circumference or another size.
Tyre Size Calculator
Compare tyre sizes, diameter and speedometer difference.
Altitude Calculator
Find altitude from air pressure, or pressure and boiling point from altitude.
Dew Point Calculator
Find the dew point and frost point from temperature and humidity, with a comfort reading.
Humidity Calculator
Find relative humidity, absolute humidity and dew point from temperature and moisture.
Julian Date Converter
Convert Gregorian dates to Julian Day Numbers and back, with the day of the week.
Resistor Color Code Calculator
Use this free resistor color code calculator to read the coloured bands on a resistor and find its resistance in ohms, its tolerance, and — for 6-band...
Yeast Converter
Convert between fresh, active dry, and instant yeast by weight or spoon.
Base64 Decoder Online
Decode base64 to text — or encode text to base64 — instantly in your browser.
Base64 to Image Converter
Turn a base64 string into an image preview and download it.
BTU to Joules Converter
Convert BTU to joules and more.
Centimeters to Meters Converter
Convert centimeters to meters — and meters back to centimeters.
CM Ruler Online
Measure anything on screen with a calibrated centimetre and inch ruler.
Cubic Meters to Gallons Converter
Convert cubic meters to gallons, liters, and cubic feet.
ETH to USD Converter
Convert Ethereum to US dollars at the price you enter.
EV Charging Cost Calculator
Find what an EV charge costs and how long it takes at home or in public.
Grams to Teaspoons Converter
Convert grams to teaspoons for water, sugar, salt and more.
KB to MB Converter
Convert KB, MB, GB and TB in both directions.
Liters to Cups Converter
Convert liters to US cups — and cups back to liters.
Voltage Calculator
Solve Ohm's law for voltage, current, resistance, and power.
BTU to Watts Converter
Convert BTU per hour to watts, kilowatts, and horsepower.
Calories to Joules Converter
Convert calories, kilocalories, joules, BTU, and kWh.
DMS to Decimal Converter
Convert degrees, minutes and seconds to decimal degrees — and back.
Kbps to Mbps Converter
Convert kilobits to megabits per second — and other data rates.
kW to HP Converter
Convert kilowatts, horsepower, and watts in any direction.
RGB to CMYK Converter
Convert RGB colors to CMYK and back, with a live swatch.
Battery Size Calculator
Size a battery bank in amp-hours and kilowatt-hours for solar, RV, or off-grid power.
Belt Size Calculator
Enter your waist or pants size in inches or cm and get your belt size for men and women, plus US, EU and UK sizes.
Bra Size Calculator
Find your US bra size from band and bust measurements, with sister sizes.
Carat to Grams
Convert carats to grams and other gemstone weights.
Cups to Pints Converter
Convert cups to pints — and pints back to cups.
Days to Weeks Converter
Convert days to weeks, months, years, hours, and minutes.
1km to Miles Converter
Convert kilometers to miles quickly and accurately.
Glove Size Calculator
Measure your hand circumference and get your glove size in letter and numeric sizes.
Inches to Pixels Converter
Convert inches to pixels at any DPI — and pixels back to inches.
Km to Cm Converter
Convert kilometers to centimeters — and centimeters back to kilometers.
Light Years to Km Converter
Convert light years, parsecs, and AU to kilometres, miles, and more.
Liters to Milliliters Converter
Convert liters to milliliters — and milliliters back to liters.
Grams to Milligrams Converter
Convert grams to milligrams and back, with kilograms and ounces too.
Inches to Yards Converter
Convert inches to yards — and yards back to inches.
Knots to MPH Converter
Convert knots to miles per hour for wind and boat speed.
Liters to Cubic Feet
Convert liters to cubic feet and other volume units.
Mg to mL Converter
Convert milligrams to milliliters for water and other liquids.
Liters to Quarts Converter
Convert liters to quarts — and quarts back to liters.
Millimeters to Inches Converter
Convert millimeters to inches for precise measurements.
mmHg to PSI Converter
Convert mmHg, psi, kPa, bar, atm, torr, and pascals.
MPH to Mach Converter
Convert miles per hour to Mach number at any altitude and temperature.
MPH to m/s Converter
Convert mph, meters per second, ft/s, km/h, and knots.
Nautical Miles to Km Converter
Convert nautical miles to kilometers, miles, and meters.
Paper Weight Calculator
Convert paper weights between gsm and pounds, and work out ream weight.
Pascal to PSI Converter
Use this free Pascal to PSI converter to change a pressure in pascals into pounds per square inch (PSI), or to change PSI back into pascals.
Pints to Quarts Converter
Convert pints to quarts — and quarts back to pints.
Pounds to Newtons Converter
Convert pounds-force to newtons — and newtons back to pounds.
PSI to kPa Converter
Convert psi, kilopascals, bar, and atmospheres.
Pt to Px Converter
Convert points to pixels at any DPI — and pixels back to points.
Radians to Degrees Converter
Convert radians to degrees — and degrees back to radians.
RPM to Rad/s
Convert RPM to radians per second and other angular speeds.
Seconds to Minutes Converter
Convert seconds to minutes — and minutes back to seconds.
Speaker Test Online
Test your speakers online for free.
Square Meters to Acres Converter
Convert square meters to acres, hectares, and square feet.
Subtract Days From Date Calculator
Add or subtract days, weeks, months, or years from any date.
Tablespoons to Cups Converter
Convert tablespoons to cups for cooking and baking.
TB to GB Converter
Convert terabytes to gigabytes — and gigabytes back to terabytes.
Toll Calculator
Estimate trip tolls by distance, rate, and vehicle class, with turnpike presets.
Tons to Kg Converter
Convert US tons, metric tonnes, and pounds to kilograms.
Troy Ounces to Grams Converter
Convert troy ounces to grams, ounces, kilograms, and grains.
Upload Speed Calculator
Find out how long a file will take to upload or download.
Video Bitrate Calculator
Work out video bitrate from file size and duration — or file size from bitrate.
Voltage Drop Calculator
Find the voltage drop and percent loss on any wire run.
Wedding Anniversary Calculator
Find your next anniversary, years married, and milestone gift.
Weeks to Years Converter
Convert weeks to years, months, days, and more.
Wire Size Calculator
Find the right wire size (AWG) for any circuit from amps and length.
Math & Science
Slope Calculator
Find the slope of a line from two points or rise over run.
Decimal to Percent Calculator
Convert decimals to percents, percents to decimals, and fractions to percents.
Volume Calculator
Compute the volume of boxes, cylinders, spheres, and cones.
Exponent Calculator
Raise any base to any power, including negative exponents.
Fraction to Decimal Calculator
Turn any fraction into a decimal or percent, including repeating decimals.
Prime Number Checker
Test if any number up to 10^18 is prime, find the next or previous prime, and list primes in a range.
Final Grade Calculator
Find the score you need on your final exam to reach your target grade.
Algebra Calculator
Solve linear equations step by step, with the working shown.
Vector Calculator
Add, subtract, and dot vectors, with magnitudes and angles.
Probability Calculator
Work out the probability of events, with odds and combinations.
Prime Factorization Calculator
Break any number into its prime factors, with a factor tree.
Half-Life Calculator
Find how much of a substance remains after any time, with a decay chart.
Factorial Calculator
Find n! exactly for n from 0 to 100, with a step-by-step expansion.
Median Calculator
Find the median, mean, mode, range, and standard deviation of any list.
GCF Calculator
Find the greatest common factor of two or three numbers, with steps.
Log Calculator
Find log base 10, natural log, log base 2, or any custom base.
Decimal to Fraction Calculator
Turn any decimal into a simplified fraction, or back again.
Binary Calculator
Convert binary to decimal, hex, and octal — and back.
Circumference Calculator
Find circumference, area, radius, or diameter of any circle.
Fibonacci Calculator
Generate the Fibonacci sequence to any term, with the golden ratio.
Permutation Calculator
Count permutations and combinations, with or without repetition.
Rounding Calculator
Round any number to decimal places, tens, hundreds, or significant figures.
Tangent Calculator
Find tangent, sine, cosine and angle values for any triangle.
Cosine Calculator
Work out cosine, sine, tangent and angles in degrees or radians.
Net Run Rate Calculator
Work out a cricket team’s net run rate from runs, overs and wickets.
Nth Root Calculator
Find the nth root of any number — square, cube, fourth root and beyond.
Equation Solver
Solve linear and quadratic equations step by step.
Confidence Interval Calculator
Find the margin of error and confidence interval for a mean or a proportion.
Density Calculator
Solve for mass, volume or density with unit options and material presets for water, steel, aluminum, gold and more.
Golden Ratio Calculator
Find the golden ratio sides of any rectangle.
Scientific Notation Converter
Convert numbers to scientific, e-notation, and engineering form.
Z-Score Calculator
Find z-scores and percentiles from any value.
Decibel Calculator
Convert power and amplitude ratios to dB, add two sound levels, and compare dB, dBm and dBV values.
Ellipse Calculator
Find the area, perimeter, eccentricity, and foci of any ellipse.
Hex Calculator
Convert between hex, decimal, binary, and octal.
Limit Calculator
Evaluate limits of f(x) numerically from both sides, with approaching-values tables.
Linear Regression Calculator
Find the slope, intercept, and R² of a best-fit line from your data.
Pythagoras Calculator
Solve right triangles: hypotenuse, legs, area, and perimeter.
Variance Calculator
Find population and sample variance from any list of numbers.
Proportion Calculator
Solve a/b = c/d for the missing value with steps shown.
Number to Words Converter
Turn any number into words — cardinal, ordinal, or currency.
Midpoint Calculator
Find the midpoint of two points, in 2D or 3D, with distance.
Lottery Odds Calculator
Work out your odds of winning Powerball, Mega Millions, and more.
Modulo Calculator
Find remainders and modular inverses, step by step.
Moon Phase Calculator
Use this free moon phase calculator to find the phase of the moon on any date.
System of Equations Solver
Solve 2x2 and 3x3 linear systems step by step with Gaussian elimination.
Wavelength Calculator
Find wavelength from frequency, or frequency from wavelength.
Chmod Calculator
Convert between octal and symbolic file permissions.
Hex to ASCII Converter
Convert hexadecimal to ASCII text and back.
LED Resistor Calculator
Find the right resistor for any LED and supply voltage.
Mixed Number Calculator
Add, subtract, multiply, and divide mixed numbers.
Words to Numbers
Turn number words like 'one thousand two hundred' into digits.
Plate Calculator
Load your barbell fast with our free plate calculator.
Surface Area Calculator
Find the surface area of cubes, spheres, cylinders, and boxes.
Home & Construction
Tile Calculator
Work out how many tiles and boxes your floor or wall needs.
Registration Charges Calculator
Work out property registration charges from the value, rate, and fixed fees — with the effective rate.
Paint Calculator
Work out how much paint, primer, and money a room needs, coats included.
Solar Panel Calculator
Size a solar panel system from your usage, with panels, cost, and payback.
Roofing Calculator
Estimate roofing shingles and cost from roof size and pitch.
Moving Cost Calculator
Estimate the cost of a house move from distance and volume.
Generator Size Calculator
Size a generator from your appliances, with watts and kVA.
Carpet Calculator
Work out square yards, strips, and seams for any carpeted room.
Flooring Calculator
Find square feet, boxes, and pieces for laminate, hardwood, or vinyl.
TV Distance Calculator
Find the best viewing distance for any TV size, or the right size.
Tank Volume Calculator
Find any tank's capacity in gallons and liters, any shape.
Deck Calculator
Work out boards, joists, and fasteners for any deck.
Mulch Calculator
Find cubic yards and bags of mulch for any bed or garden.
Wallpaper Calculator
Work out rolls and square feet of wallpaper for any room.
Pool Volume Calculator
Find pool volume in gallons and litres, any shape.
Drywall Calculator
Work out drywall sheets, screws and compound for any room.
Gravel Calculator
Find cubic yards and tons of gravel for any area.
Recipe Scaler
Scale any recipe up or down — ingredients adjust automatically.
Coffee Ratio Calculator
Find the perfect coffee-to-water ratio for any brew method.
Backsplash Tile Calculator
Enter your wall size and tile size to get tiles needed, boxes to buy, and a grout estimate — with waste included.
Countertop Calculator
Countertop area and cost for any material and layout.
Lawn Seed Calculator
Work out how much grass seed your lawn needs, by area and grass type.
Packing Calculator
Estimate boxes, tape, and wrap for your move.
Asphalt Calculator
Calculate asphalt tonnage for driveways and parking areas.
Bathroom Remodel Cost Calculator
Estimate the cost of a bathroom remodel by size and finish.
Board Foot Calculator
Figure board feet for lumber projects and pricing.
Concrete Footing Calculator
Work out concrete volume and bag counts for any footing.
Brick Calculator
Find how many bricks and mortar bags a wall needs.
Fence Post Calculator
Posts, panels, rails, and concrete for any fence run.
Insulation Calculator
Work out how many bags, batts, or kits insulate a space.
Sand Calculator
Find cubic yards, tons, and bags of sand for any area.
Deck Cost Calculator
Estimate your deck cost with our deck cost calculator.
Garage Size Calculator
Find the right garage size for your vehicles and storage.
Kitchen Remodel Cost Calculator
Estimate a kitchen remodel from size and finish level.
Patio Cost Calculator
Estimate patio cost by size, material, and finish.
AC Tonnage Calculator
Size your air conditioner with our AC tonnage calculator.
Aquarium Calculator
Work out aquarium gallons, glass, and fish capacity.
Baseboard Calculator
Figure out how many baseboards you need with our baseboard calculator.
Book Spine Calculator
Work out a book's spine width from pages and paper thickness.
Bread Hydration Calculator
Find water, salt, and starter weights for any hydration level from your flour.
BTU Calculator
Work out the heating and cooling BTU your room needs.
Compost Calculator
Work out the right greens-to-browns mix for compost.
Egg Timer
A simple egg timer with soft, medium, and hard presets.
Fabric Yardage Calculator
Work out how much fabric you need for any sewing project.
Candle Burn Time Calculator
Work out how long a candle will burn from its wax and wick.
Candle Wax Calculator
Find wax, fragrance, and wicks for handmade candles in any jar.
Chicken Coop Calculator
Size a chicken coop and run for your flock.
Curtain Size Calculator
Work out curtain width, length, and fabric for any window.
Fertilizer Calculator
Find how much fertilizer your lawn or garden needs.
Firewood Calculator
Work out how much firewood you have with our firewood calculator.
Furnace Size Calculator
Find the right furnace BTU size for your home.
Hardwood Floor Cost Calculator
Estimate hardwood flooring costs — materials, labour and boxes.
Home Renovation Cost Calculator
Pick a project type, size and finish level to get a low-high cost range with a per-sq-ft breakdown.
Knitting Gauge Calculator
Turn your gauge swatch into cast-on stitches, rows needed, and a yarn estimate for any project.
Lotion Calculator
Formulate a DIY lotion batch with exact grams for each phase.
Lumber Calculator
Work out board feet and cost for any lumber list.
Oil Change Cost Calculator
Work out the cost of an oil change by oil type, capacity, filter and labour — DIY or garage.
Paver Calculator
Count pavers, gravel, sand, and edging for a patio or driveway, with cost.
Pergola Calculator
Estimate lumber and cost for a backyard pergola.
Pipe Size Calculator
Find the right pipe diameter from flow rate and velocity, with friction loss.
Pizza Dough Calculator
Scale pizza dough by flour, water, salt, and yeast for any number of pizzas.
Pool Chemical Calculator
Work out chlorine, pH, and alkalinity doses for your pool.
Projector Throw Calculator
Find the right projector distance for any screen size and throw ratio.
Quilt Calculator
Find fabric yardage, blocks, backing, and binding for any quilt size.
Rafter Calculator
Find rafter length, ridge height, and birdsmouth cuts for any roof.
Raised Bed Soil Calculator
Work out soil, compost, and bags for a raised bed.
Rebar Calculator
Calculate rebar length, bars, and weight for slabs and footings.
Resin Calculator
Find how much resin you need with our resin calculator.
Retaining Wall Calculator
Find blocks, cap, gravel, and cost for a retaining wall.
Roof Shingle Calculator
Estimate shingle bundles and squares for any roof.
Seed Calculator
Pick a vegetable, enter row length and rows, and get seeds needed, packets to buy, and expected plants after germination.
Shed Size Calculator
Find the right shed size for your tools, bikes, and mower.
Siding Calculator
Estimate siding squares, boxes, and pieces for any wall.
Snow Removal Calculator
Estimate snow volume, weight, clearing time, and de-icer for your driveway.
Soap Calculator
Work out lye and water for cold-process soap recipes.
Sod Calculator
Estimate sod rolls or pallets for any lawn, with waste included.
Sourdough Calculator
Work out flour, water, starter, and salt for the perfect sourdough loaf.
Sprinkler Calculator
Work out sprinkler heads, zones, and water use for your lawn.
Storage Unit Size Calculator
Find the right storage unit size for your rooms and boxes.
Stud Calculator
Count wall studs and plate lumber for any wall length.
Tire Pressure Calculator
This free tire pressure calculator finds the recommended tire pressure for your vehicle, adjusts it for the load you are carrying and the temperature...
Towing Capacity Calculator
Check if your vehicle can safely tow a trailer.
Turkey Cooking Time Calculator
Cooking time, thawing time, and done-by time for any turkey.
Window Replacement Cost Calculator
Estimate the cost of replacing windows in your home.
Yarn Calculator
Find how much yarn your knitting or crochet project needs.
Crown Molding Calculator
Enter room size, molding size, corners and waste to get linear feet, pieces to buy, and estimated cost by material.
Gutter Calculator
Enter roof area, rainfall intensity and gutter length to get the right gutter size, downspouts needed, and estimated cost.
Joist Calculator
Enter span, spacing, loads and species to find the required floor joist size and max span, based on published design values.
Roof Pitch Calculator
Find roof pitch, angle, and slope from rise and run.
Stair Calculator
Work out risers, riser height, treads, and total run for stairs.
Generators & Text Tools
WiFi Password Generator
Generate a strong, random WiFi password — choose 8–63 characters, letters, numbers and symbols.
How Old Am I
Find your exact age in years, months, and days from your birth date.
Salary Slip Generator
Build a clean, printable payslip with earnings, deductions, and net pay — no sign-up, nothing uploaded.
Qibla Direction Finder
Find the direction of the Kaaba from anywhere in the world, with a compass, bearing, and distance.
Love Calculator
Enter two names to get a love compatibility score, verdict, and lucky number.
Morse Code Translator
Translate text to Morse code and back, with audio playback.
Random Team Generator
Split names into random balanced teams in one click.
Urdu Keyboard Online
Type in Urdu online with an on-screen keyboard, and copy the text.
Random Number Generator
Generate random numbers in any range, with or without duplicates.
Case Converter
Change text to UPPERCASE, lowercase, Title Case, camelCase, and more.
UUID Generator
Generate UUID v1, v4, or v21 values in your browser, up to 50 at once.
Palindrome Checker
Check if any word, phrase, or number reads the same backwards.
Random Color Generator
Generate random hex and RGB colours, with copy and lock.
Word Frequency Counter
Count words, frequency, and top words in any text.
Quote Generator
Get an inspiring quote — new one every time you click.
Random String Generator
Generate random strings of letters, numbers and symbols.
Text to Binary
Convert text to binary code and binary back to text.
ASCII Art Generator
Turn words into big ASCII art letters in four styles.
CSS Minifier
Shrink CSS by removing comments and whitespace, with before and after sizes.
Markdown Table Generator
Build markdown tables with alignment and download the .md file.
Acronym Generator
Turn any phrase into an acronym, or expand an acronym into words.
API Key Generator
Generate secure API keys in hex, base64, alphanumeric, or UUID form.
ASCII to Text
Convert ASCII codes to text in decimal or hex, instantly.
JSON Minifier
Minify or beautify JSON and see the bytes saved.
MD5 Generator Online
Generate MD5 hashes from text or files, instantly and in your browser.
Regex Tester
Test regular expressions live and see every match.
Bcrypt Generator
Hash passwords with bcrypt in your browser.
JWT Generator
Create a signed JSON Web Token (HS256) right in your browser.
SHA256 Generator
Hash any text or file with SHA-256, free and private.
Backwards Text Generator
Flip any text backwards in seconds with this free backwards text generator, also known as a reverse text generator.
Band Name Generator
Get five band name ideas in rock, metal, indie, and more.
Bar Graph Maker Online
Make a bar graph from your data and download it as a PNG image.
Attendance Calculator
Work out your attendance percentage and how many classes you can miss.
Big Five Personality Test
Take this free Big Five personality test and discover your scores for openness, conscientiousness, extraversion, agreeableness, and neuroticism.
Birthday Card Maker
Design a birthday card with themes and download it as a PNG.
Blog Title Generator
Generate catchy blog titles by topic, tone, and style.
Border Radius Generator
Design rounded corners with a live preview and copy the CSS.
Birthday Wish Generator
Generate birthday wishes by tone and relationship, ready to copy.
Birthstone Finder
Find your birthstone by month or birth date, with its meaning.
Box Shadow Generator
Build CSS box shadows with a live preview and copy the code.
Cat Name Generator
Generate cat names by sex and style — cute, classic, or funny.
Certificate Generator Online
Make a printable achievement certificate and download it as a PNG.
Character Name Generator
Generate character names for modern, fantasy, and sci-fi stories.
ChatGPT Prompts
Ready-made ChatGPT prompts for writing, coding, business, and learning.
Chinese Zodiac Calculator
Find your Chinese zodiac animal and element from your birth year.
Cover Letter Generator
Write a tailored cover letter from your job details in seconds.
Cron Expression Generator
Build cron expressions and see them in plain English.
CSS Grid Generator
Build a CSS grid visually with this free CSS grid generator.
Days Until Birthday
Count down the days until your next birthday — and see the age you will turn.
Dead Pixel Test
Test your screen for dead or stuck pixels with fullscreen color slides.
DJ Name Generator
Generate DJ names by style — EDM, house, techno, hip-hop, and more.
Dog Name Generator
Find the perfect name for your dog by gender and style.
Fancy Font Generator
Turn plain text into fancy Unicode fonts to copy and paste.
Flexbox Generator
Build CSS flexbox layouts live and copy the code.
Font Pairing Generator
Find heading and body font pairs that look great together.
Free Fire Name Generator
Generate stylish, pro, and funny Free Fire names with symbols.
Friendship Calculator
Get a fun friendship score for two names — just for fun.
Gamertag Generator
Generate cool, funny, and fantasy gamertags for your next game.
Guitar Chord Finder
Find any guitar chord with fingering diagrams, notes, and barre voicings.
Habit Tracker Online
Track daily habits, build streaks and see your progress week by week.
Haiku Generator
Create a true 5-7-5 haiku in nature, seasons, city, or love themes — every line syllable-checked.
Horoscope Online
Get your free daily horoscope by zodiac sign.
HTML Decoder
Decode HTML entities instantly — & to &, © to ©, and more.
HTML Table Generator
Build clean HTML tables with headers, captions, and styling in seconds.
Instagram Bio Generator
Generate a ready-to-copy Instagram bio from your name and niche.
Instagram Name Generator
Generate Instagram handles from any keyword, in four styles.
Invisible Character Copy
Copy invisible characters and find hidden ones in your text.
IQ Test for Kids
A fun 10-question brain quiz for kids — not a clinical test.
ISBN Barcode Generator
Generate a real EAN-13 barcode from any ISBN.
Italic Text Generator
Turn plain text into italic Unicode text for bios and posts.
JWT Decoder Online
Decode any JWT to read its header and payload — no signature check.
Kanban Board
A simple kanban board to organize tasks, saved in your browser.
Lease Agreement Generator
Create a plain-English residential lease agreement from your details.
Leet Speak Translator
Translate text to and from leet speak (1337).
LinkedIn Headline Generator
Write a LinkedIn headline that gets noticed.
Logo Size Guide
Find the right logo dimensions for every platform, plus an aspect-ratio scaler.
Love Language Quiz
A fun 10-question quiz to find your love language.
Memory Test Online
Test your memory with a growing number sequence — how far can you go?
Meta Tag Generator
Build SEO title, description, Open Graph, and Twitter card tags in seconds, with a live search preview.
Metronome Online
Use this free metronome online to keep perfect time while you practise.
Mouse Test Online
Test your clicks per second (CPS) in 5 or 10 seconds.
NDA Generator
Create a non-disclosure agreement from your details and download it.
Nickname Generator
Generate cute, cool, or funny nicknames for anyone.
Numerology Calculator
Find your Life Path, Destiny, and Soul Urge numbers from name and birth date.
OTP Generator Online
Generate one-time passcodes of any length, securely in your browser.
Paragraph Counter
Count paragraphs, sentences, words, and characters instantly.
Passphrase Generator
Generate a strong, memorable passphrase from random words.
Pet Name Generator
Find the perfect name for your new best friend.
Pig Latin Translator
Translate English to Pig Latin and back, instantly.
PIN Generator
Generate secure random PIN codes of any length, with no repeats or sequences.
Pixel Art Generator
Draw pixel art on a grid and download it as a PNG.
Podcast Name Generator
Generate podcast name ideas by topic and tone.
Quotation Generator
Build a professional price quotation with line items, tax, and totals.
Random Animal Generator
Get a random animal with a fun fact for games and ideas.
Random Date Generator
Pick random dates between any two dates, in any format.
Random Emoji Generator
Generate random emojis by category, ready to copy.
Random Letter Generator
Generate random letters with vowel, case, and no-repeat options.
Random Paragraph Generator
Generate random paragraphs for mockups, writing practice, and testing.
Random Sentence Generator
Create random sentences in seconds.
Rap Name Generator
Get a rap stage name in classic, trap, or funny styles.
Reading Time Calculator
Find how long any text takes to read or speak aloud.
Receipt Generator
Build a clean, printable receipt with items, tax, and tip.
Remove Duplicate Lines
Paste your text, keep the first copy of each line, and copy or download the clean, unique list.
Remove Line Breaks
Remove line breaks from any text in seconds.
Rent Receipt Generator
Create a printable rent receipt with landlord, tenant, and amount.
Resignation Letter Generator
Write a professional resignation letter in minutes.
Restaurant Name Generator
Generate restaurant names by cuisine, from Italian to café.
Rhyming Words Finder
Type any word and get perfect and near rhymes instantly, with syllable and result-count filters.
Robots.txt Generator
Build a robots.txt file for your website in seconds with this free robots.txt generator.
Schema Markup Generator
Generate valid JSON-LD schema markup for your pages.
Sentence Counter
Count sentences, words, and characters in any text instantly.
SHA-1 Generator
Hash text or a file in your browser and get the 40-character SHA-1 checksum instantly.
Small Text Generator
Convert text to small caps or superscript tiny text.
Speaking Time Calculator
Find out how long your speech takes to say with this free speaking time calculator.
Strikethrough Text Generator
Cross out text with Unicode strikethrough, double strike, slash, or tilde styles.
Superhero Name Generator
Create a superhero name, alias, and power from your choices.
Team Name Generator
Generate fun, fierce, or professional team names in one click.
Town Name Generator
Generate town names for stories, games, and world-building.
UPC Barcode Generator
Create a scannable UPC-A barcode from 11 or 12 digits and download it as PNG.
Upside Down Text Generator
Flip your text upside down with Unicode characters.
URL Decoder
Decode percent-encoded URLs and encode text back, right in your browser.
vCard QR Code Generator
Make a QR code that shares your contact details.
Venn Diagram Maker
Build 2- or 3-circle Venn diagrams from your own sets and download them as PNG.
Villain Name Generator
Generate villain names in classic, sci-fi, fantasy, and modern styles.
Visiting Card Maker
Design a business visiting card and download it as a PNG.
Wedding Hashtag Generator
Create a wedding hashtag from your names and date.
Wedding Planner Printable
Plan your wedding with a 12-month checklist, budget tracker, and printout.
What Is My Browser
See your browser, version, operating system and screen details instantly.
Wide Text Generator
Convert text to wide fullwidth characters and back.
WiFi QR Code Generator
Make a QR code that connects any phone to your WiFi.
Writing Prompt Generator
Pick a genre and get an original story prompt with a character, setting, conflict, and twist.
Yes No Oracle
Ask a yes or no question and let the oracle decide.
YouTube Name Generator
Generate catchy YouTube channel name ideas by niche.
YouTube Thumbnail Size
Check your thumbnail is the right 1280×720 size and 16:9 ratio.
YouTube Title Generator
Generate clickable YouTube video titles for any topic.
Zalgo Text Generator
Turn plain text into creepy glitched zalgo text with adjustable intensity.
Health, Fitness & Education
TDEE Calculator Online
Find your total daily energy expenditure and calorie targets.
Keto Calculator
Use this free keto calculator to find your daily calories and keto macros in grams.
Water Intake Calculator
Find your daily water intake from weight and activity.
Blood Pressure Calculator
Use this free blood pressure calculator to find what your reading means.
Baby Percentile Calculator
Check a baby's weight and height against WHO growth percentiles.
Max Heart Rate Calculator
Find your maximum heart rate and training zones by age.
Test Score Calculator
Convert test marks into percentages, grades and GPA.
Lean Body Mass Calculator
Find lean mass, body fat percentage, and fat mass from height and weight.
VO2 Max Calculator
Estimate VO2 max from a walk test, run test, or resting heart rate.
Body Surface Area Calculator
Calculate body surface area with Mosteller, Du Bois, or Haycock.
Workout Plan Generator
Build a weekly training plan for muscle, strength, or weight loss.
Caffeine Calculator
Estimate caffeine in your system from coffee, tea, and energy drinks.
Child Height Predictor
Predict your child's adult height from parents' heights.
Sleep Debt Calculator
Work out your sleep debt and a catch-up plan.
Steps to Calories Calculator
Estimate calories burned from steps, weight, and pace.
Dog Food Calculator
Work out how much food your dog needs each day by weight and age.
Marathon Pace Calculator
Find your pace, splits and finish time for any race distance.
Resting Heart Rate Calculator
Check your resting heart rate and what it means for fitness.
GPA to Percentage Calculator
Convert GPA to percentage for Indian and international grading scales.
Blood Type Calculator
Find the possible blood types of a child from both parents' blood types.
Cholesterol Calculator
Enter total cholesterol, HDL, LDL, and triglycerides in mg/dL or mmol/L to get your ratios, non-HDL cholesterol, and ATP III category.
Period Calculator
Predict your next period and fertile window from your cycle.
Stress Test Online
Answer 10 quick questions and get a stress score with coping tips.
ACT Score Calculator
Turn four ACT section scores into your composite score.
Alcohol Units Calculator
Work out the alcohol units and calories in your drinks.
Anxiety Test Online
A 7-question self-check for anxiety symptoms over the past two weeks.
Baby Gender Predictor
Predict your baby’s gender the fun way — Chinese calendar and Mayan methods.
Body Fat Percentage Calculator
Estimate body fat with the US Navy method or a BMI estimate.
Intermittent Fasting Calculator
Plan your fast with our free intermittent fasting calculator.
SAT Score Calculator
Convert raw SAT section scores to the 400–1600 scale.
Weight Loss Percentage Calculator
Track your weight-loss percentage and time to goal.
BAC Calculator
Estimate blood alcohol content from drinks, weight, and time — with safety guidance.
Bench Press Calculator
Estimate your one-rep max and training weights.
GMAT Score Calculator
Estimate your GMAT total score from quant, verbal, and data insights.
GRE Score Calculator
Convert old GRE scores (200–800) to the new 130–170 scale, with percentile estimates and total score.
Bike Frame Size Calculator
Find your road, mountain, or hybrid frame size.
Body Shape Calculator
Find your body shape from bust, waist, and hip measurements.
Cat Calorie Calculator
Use this free cat calorie calculator to find how many calories your cat needs each day.
Cycling Power Calculator
Estimate the watts needed to ride at any speed, weight and gradient.
Breathing Exercise Timer
Guided breathing exercises with a visual timer.
Deadlift Calculator
Estimate your one-rep max deadlift from any set.
FFMI Calculator
Measure fat-free mass index and see where you stand.
Fiber Intake Calculator
Enter your age, sex, and daily calories to get your recommended daily fiber in grams, plus high-fiber foods.
Cat Pregnancy Calculator
Enter the mating date and get the expected due date, a 63–65 day window, and week-by-week milestones.
Dog Pregnancy Calculator
Work out your dog's due date and whelping window.
Face Shape Finder
Find your face shape from four simple measurements.
Fantasy Points Calculator
Calculate fantasy points for NFL, NBA, MLB, and soccer.
Fat Intake Calculator
Work out how many grams of fat to eat each day with our free fat intake calculator.
Golf Handicap Calculator
Work out your WHS handicap index from your last 20 rounds.
Hearing Test Online
Test your hearing range ear by ear with tones from 250 Hz to 8,000 Hz.
Horse Feed Calculator
Work out daily hay, grain, and water for your horse by weight and workload.
Horse Weight Calculator
Estimate a horse's weight from heart girth and body length.
Interval Timer
A workout interval timer with work, rest, and rounds.
Jet Lag Calculator
Estimate how long jet lag will last with our free jet lag calculator.
LSAT Score Calculator
Estimate your LSAT scaled score from your raw score.
Mental Age Calculator
Take a quick 10-question quiz and estimate your mental age.
Metabolic Age Calculator
Estimate your metabolic age from BMR, age, and activity.
Nap Calculator
Find the best nap start and wake times in sleep cycles.
Pet Age Calculator
Convert your pet's age to human years.
Reaction Time Test
Test your reaction time — click when the screen turns green.
Screen Time Calculator
Track daily screen time across devices and compare with limits.
Triathlon Pace Calculator
Plan your race time for Sprint, Olympic, Half Ironman or Full Ironman distances.
Vision Test Online
Check your eyesight at home with a Snellen chart calibrated to your screen.
Weighted GPA Calculator
Calculate your weighted and unweighted GPA from your courses.
Wilks Calculator
Find your Wilks score from bodyweight and total lifted.
Puppy Weight Calculator
Estimate your puppy's adult weight from its age and weight.
File & PDF Tools
PNG to PDF Converter
Turn PNG images into a PDF, several images per page, right in your browser.
PNG to JPG Converter
Convert PNG images to JPG format right in your browser.
TXT to PDF Converter
Turn plain text into a real PDF file, right in your browser.
PNG to WebP Converter
Convert PNG images to WebP, right in your browser.
CSV to Excel Converter
Turn CSV files into real Excel spreadsheets, in your browser.
JPEG to PNG Converter
Turn JPG photos into lossless PNG images, right in your browser.
PNG to ICO Converter
Turn any PNG into a Windows icon file, with transparency kept.
DOCX to TXT Converter
Turn Word documents into clean plain text, in your browser.
JSON to CSV Converter
Convert JSON data into CSV spreadsheets, in your browser.
CSV to XML Converter
Convert CSV data into XML, in your browser.
ICO to PNG Converter
Turn Windows icon files back into PNG images, in your browser.
Excel to CSV Converter
Convert Excel spreadsheets to CSV files with your choice of delimiter.
YAML to JSON Converter
Convert YAML data to JSON instantly, in your browser.
AVIF to JPG Converter
Convert AVIF images to JPG with a quality slider, in your browser.
Blur Image Online
Blur an image with an adjustable slider and download the result.
GIF to JPG Converter
Convert GIF images to JPG, PNG, or WebP in your browser.
JSON to XML Converter
Free JSON to XML converter in your browser.
CSV to PDF Converter
Turn a CSV file into a formatted PDF table in your browser.
JSON to PDF Converter
Turn JSON data into a formatted PDF.
Audio Joiner Online
This free audio joiner online merges two or more MP3 and WAV files into one audio file, right in your browser.
BMP to JPG Converter
Convert BMP images to JPG with quality and resize controls.
GIF to WebP Converter
Free GIF to WebP converter in your browser.
Grayscale Image Converter
Turn any photo black and white in your browser and download the result.
Image Color Extractor
Pull the dominant colours out of any image, with HEX and RGB values.
Image Flipper
Flip an image horizontally or vertically in one click.
Invert Image Colors
Flip any image into a photographic negative, right in your browser.
JPG to AVIF Converter
Convert JPG images to the smaller AVIF format, free and in your browser.
JSON to YAML Converter
Convert JSON to YAML in your browser.
MP3 to WAV Converter
Convert MP3 audio to WAV files in your browser — no uploads.
Photo Size Calculator
Find print size from photo pixels and DPI, or the pixels a print size needs.
Pixelate Image
This free pixelate image tool turns a photo into big, chunky blocks of color in your browser.
Rotate Image Online
Rotate any image 90°, 180°, or by a custom angle and download it.
Round Image Corners
Free round image corners tool in your browser.
SVG Compressor
Shrink SVG files by removing comments and extra precision.
TSV to CSV Converter
Convert tab-separated data to CSV in your browser — paste or upload a file.
WAV to MP3 Converter
Convert WAV audio to MP3 right in your browser.
WebP to GIF Converter
Turn WebP images into GIFs without uploading anything.
XML to CSV Converter
Turn XML data into a CSV spreadsheet in seconds.
XML to JSON Converter
Convert XML data to JSON instantly, with validation.
XML Validator
Check XML for errors and pretty-print it in your browser.
YAML to XML Converter
Convert YAML to XML in your browser — paste or upload, no sign-up.
SVG to JPG Converter
Turn SVG graphics into JPG images with a background colour of your choice.
Frequently asked questions
What is RupayaTools?
RupayaTools is a free website with 653 online tools. You get salary tools (CTC, in-hand pay, gratuity, HRA), construction estimators (concrete, bricks, cement, project cost), finance tools (SIP, EMI, FD, PPF, CAGR, GST, income tax), unit converters (cm to feet, kg to pounds, land units) and image & PDF tools (photo compression, PDF shrink). There are also handy extras like an age calculator and a number-to-words converter.
Is RupayaTools really free?
Yes. Every calculator on RupayaTools is completely free — no limits, no paid tiers, no hidden charges. There is no sign-up either. Just open a tool and start calculating.
Is my data private?
Yes. Every calculation happens in your browser, on your own device. We ask for no personal details, set no cookies, run no analytics and store nothing on our servers — because there is nothing to send. Read our privacy policy for details.
How accurate are the calculators?
Our tools use standard formulas and Indian conventions, including statutory gratuity rules, GST slabs and income tax regimes. Results are estimates meant for planning. For big decisions, always check with a qualified professional — see our disclaimer.
Do I need to sign up or download anything?
No. RupayaTools is a plain static website. No accounts, no apps to install, no downloads. It works in any modern browser on phones, tablets and computers.
Can I use RupayaTools on my mobile phone?
Yes. The site is built mobile-first, so every calculator works smoothly on small screens with large, touch-friendly inputs. It is lightweight and loads quickly even on slower connections.
