A gravel driveway is one of the most common bulk material jobs, and the amount depends on area and depth.
Pick a depth
For a fresh top layer over an existing base, 3 to 4 inches is typical. A full build from bare ground uses a deeper sub base of crusher run topped with a finer stone, often 6 inches or more in total.
Work out the volume
Multiply length by width by depth, then convert to cubic yards by dividing cubic feet by 27. A 20 by 30 foot driveway at 4 inches is about 7.4 cubic yards, roughly 10 tons of crushed gravel.
Order by the ton
Suppliers usually sell by weight, so confirm the density of your chosen stone to convert cubic yards to tons accurately.
See pre-calculated sizes. driveway gravel sizes →
Common questions
How much gravel for a 20 by 30 driveway?
At 4 inches deep, about 7.4 cubic yards, roughly 10 tons of crushed gravel.
How deep should driveway gravel be?
Three to four inches for a top layer, more for a full build with a sub base.
More Calculators
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Enter the area and one tile size. 10 percent waste added.
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Enter the patio size and one paver size. 5 percent waste added.
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Enter the roof surface area. 10 percent waste added. Three bundles per square.
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Enter area to cover and the coverage printed on the package. 5 percent added.
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Enter total fence length and post spacing.
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Enter the area to cover. 5 percent allowance added.
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Enter area and seeding rate. Default rates suit a new lawn.
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Enter area, target nitrogen rate and the first number on the bag.
Cubic Yards New
Enter length, width and depth. No waste added.
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Enter length and width.
Board Foot New
Enter board dimensions and quantity.
Material Cost New
Enter quantity, unit price, tax and delivery. Figures are in your own currency.