Gravel calculator: how much gravel do I need?
0.93 cubic yards
A 10 by 10 ft area at 3 inches deep needs 0.93 cubic yards of gravel, which is 25 cubic feet. Gravel is sold by the cubic yard, so a supplier would deliver 1 cubic yard.
25 cubic feet · for 10 × 10 ft at 3 in
Run your own numbers
Enter it the way you measured it: 4.5, 4 1/2,
3/8 or 10' 6".
0.93 cubic yards
25 cubic feet
A worked example
A 13 by 9 ft driveway strip at 3.5 inches deep needs 1.26 cubic yards. 34.1 cubic feet, so a 1.5 cubic yard delivery covers it.
What else it is called
Gravel covers pea gravel, crushed stone, river rock and decomposed granite. The volume you need is the same for all of them, because it is geometry. What changes between them is the weight per cubic yard, and that is exactly why this page gives cubic yards and not tons. The same arithmetic works for aquarium gravel: a tank is just a small rectangle, so enter its inside length and width in feet and the depth of the bed in inches.
Common sizes
| Area | 2 in deep | 3 in deep | 4 in deep | 6 in deep |
|---|---|---|---|---|
| 8 × 8 ft | 0.4 | 0.59 | 0.79 | 1.19 |
| 10 × 10 ft | 0.62 | 0.93 | 1.23 | 1.85 |
| 10 × 12 ft | 0.74 | 1.11 | 1.48 | 2.22 |
| 12 × 12 ft | 0.89 | 1.33 | 1.78 | 2.67 |
| 12 × 16 ft | 1.19 | 1.78 | 2.37 | 3.56 |
| 16 × 20 ft | 1.98 | 2.96 | 3.95 | 5.93 |
| 20 × 20 ft | 2.47 | 3.7 | 4.94 | 7.41 |
Cubic yards. Round up to what your supplier will deliver.
Where the numbers come from
- 1 cubic yard = 27 cubic feet, exact by definition. Everything on this page is that arithmetic and nothing else.
Gravel is also sold by the ton. Tons depend on the density of the specific stone, which varies by material and by how wet it is, so we do not print a ton figure we cannot source. Ask your supplier for the tons per cubic yard of the stone you are buying.
Last checked September 26, 2026. How this site is made.