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Snow Removal Calculator
Use this free snow removal calculator to find out how much snow is really sitting on your driveway, sidewalk, or patio before you start clearing it. Enter the size of the area and the snowfall depth, choose the snow type and removal method, and it estimates the snow volume and weight, the time to clear it, and the de-icer you will need.
If you enter a total area, the calculator uses that instead of length × width.
| Result | Amount |
|---|---|
| Area to clear | 480 sq ft |
| Snow volume | 240 cu ft |
| Snow volume | 8.9 cu yd |
| Snow weight | 4,800 lb |
| Snow weight | 2.4 tons |
| Estimated time to clear | 1 hr 15 min |
| De-icer (salt) needed | 20 lb |
How it works
Snow looks light when it falls, but it adds up fast. A thin layer over a large driveway can weigh as much as a car, and a deep layer of wet snow can weigh several tons. It turns three measurements — area, depth, and snow type — into the numbers that matter before you pick up a shovel: how much snow there is, how much it weighs, how long clearing will take, and how much de-icer to spread afterward.
Start with the area. Measure the length and width of the driveway, sidewalk, or patio in feet, or enter the total area in square feet. If you enter a total area, the calculator uses that number and ignores length and width. The presets fill in common sizes: a driveway of 40 by 12 feet, a sidewalk of 50 by 4 feet, and a patio of 20 by 15 feet.
Next, enter the snowfall depth in inches. Measure in a few flat, open spots and take the average, because wind piles snow into drifts that can be much deeper than the true snowfall. The calculator accepts depths from half an inch to 36 inches. For a storm that is still falling, enter the depth you expect by the time you clear, or clear in two passes and run the calculator for each pass separately.
Snow type sets the density of the snow. Light, fluffy snow weighs about 5 pounds per cubic foot, average snow about 10 pounds per cubic foot, and wet, heavy snow about 20 pounds per cubic foot. The same 6 inches of snow can therefore weigh four times as much when it is wet as when it is light and fluffy.
The removal method sets the clearing time. Shoveling is the slowest method and the hardest work. A single-stage snowblower suits light snow on small driveways and sidewalks but struggles with deep, wet snow. A two-stage snowblower handles deep, wet snow and clears a wider path with each pass. A plow service is fastest for a driveway, but it cannot clear steps or narrow paths.
Volume = area × depth in feet
Weight = volume × snow density
De-icer = area ÷ 25 square feet per pound
The formulas are simple once the depth is in feet. The area is length times width. The volume is the area times the depth, with the depth converted from inches to feet by dividing by 12. The weight is the volume times the density for the snow type you chose: 5, 10, or 20 pounds per cubic foot. To get cubic yards, divide the volume by 27. To get tons, divide the weight by 2,000.
Clearing time is estimated from the area, the depth, and the snow type, using a base pace for each method. Shoveling takes about 12 minutes per 100 square feet for 6 inches of average snow, a single-stage snowblower about 4 minutes, a two-stage snowblower about 2 minutes, and a plow about half a minute. Deeper and wetter snow both slow the work down. Results are rounded to the nearest minute.
De-icer is estimated at a light application rate of 1 pound per 25 square feet, so a 480 square foot driveway needs about 20 pounds of salt. Spread it evenly after clearing, not before, so it works on the thin layer left behind. Use less on new concrete and anywhere runoff reaches lawns or planting beds.
Worked example
Take a typical driveway that is 40 feet long and 12 feet wide, covered with 6 inches of wet, heavy snow, cleared by shovel.
Step 1: Find the area. 40 × 12 = 480 square feet.
Step 2: Convert the depth to feet. 6 inches ÷ 12 = 0.5 feet.
Step 3: Find the volume. 480 × 0.5 = 240 cubic feet. Divide by 27 to get cubic yards: 240 ÷ 27 = 8.9 cubic yards.
Step 4: Find the weight. Wet snow weighs 20 pounds per cubic foot, so 240 × 20 = 4,800 pounds. Divide by 2,000 to get tons: 4,800 ÷ 2,000 = 2.4 tons.
Step 5: Find the clearing time. Shoveling takes about 12 minutes per 100 square feet for average snow, so 480 ÷ 100 × 12 = 57.6 minutes, adjusted for wet snow to about 75 minutes, or 1 hour 15 minutes.
Step 6: Find the de-icer. 480 ÷ 25 = 19.2 pounds, rounded up to 20 pounds.
The result is 4,800 lb of snow — 240 cu ft (8.9 cu yd), 2.4 tons, about 1 hr 15 min by shovel, and 20 lb of de-icer. That is exactly what the calculator shows for these inputs.
FAQ
How much does snow weigh?
Light, fluffy snow weighs about 5 pounds per cubic foot, average snow about 10 pounds, and wet, heavy snow about 20 pounds. A 40 by 12 foot driveway with 6 inches of wet snow holds about 240 cubic feet of snow, which weighs about 4,800 pounds, or 2.4 tons.
How much de-icer salt do I need for my driveway?
For a light application, allow about 1 pound of de-icer per 25 square feet. A 480 square foot driveway needs about 20 pounds, roughly half of a standard 40 pound bag. Spread it evenly after clearing, and use less on new concrete or where runoff reaches plants.
How long does it take to shovel a driveway?
A 40 by 12 foot driveway with 6 inches of wet snow takes about 1 hour 15 minutes to shovel by hand, and about 12 minutes with a two-stage snowblower. Light snow is much faster than wet snow, and clearing in two passes during a long storm beats waiting until it has all fallen.
Should I use a snowblower or hire a plow service?
A single-stage snowblower suits light snow up to about 8 inches on a small driveway or sidewalk. A two-stage snowblower handles deeper, wetter snow and larger driveways. Hire a plow service if the driveway is long or steep, the snow is very deep, or you cannot shovel safely. A plow does not clear steps or narrow paths.
How do I measure snowfall depth?
Measure in a few flat, open spots that are not drifted, and take the average. Push a ruler straight down to the pavement and read the depth where the snow surface meets the ruler. Do not measure in drifts against a wall or fence, because drifts can be several times deeper than the true snowfall.