Decomposed granite calculator: how much decomposed granite do I need?
0.93 cubic yards
25 cubic feet · for 10 × 10 ft at 3 in
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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 10 by 10 ft area at 3 inches deep needs 0.93 cubic yards of decomposed granite, which is 25 cubic feet. Bulk decomposed granite is ordered by the cubic yard, the unit this answer is in.
A worked example
A 36 by 3 1/2 ft garden path at 2 1/2 inches deep needs 0.98 cubic yards. 126 square feet at 2.5 inches is 26.3 cubic feet, and 26.3 divided by 27 is 0.97, rounded up to 0.98 so the path is not left short.
How many square feet does a cubic yard of decomposed granite cover?
A cubic yard is 27 cubic feet, so it covers 324 square feet 1 inch deep, 162 square feet at 2 inches, 108 square feet at 3 inches and 81 square feet at 4 inches. Divide 324 by your depth in inches for any other depth, or enter your area and depth above to get the cubic yards directly.
What else it is called
Decomposed granite is sold as DG, crushed granite, granite fines or granite gravel, plain or stabilized with a binder for paths and patios. It is sold by the cubic yard in bulk and in bags by the cubic foot, so the cubic feet under the result is the count in 1 cubic foot bags.
Common sizes
| Area | 2 in deep | 3 in deep | 4 in deep | 6 in deep |
|---|---|---|---|---|
| 8 × 8 ft | 0.40 | 0.60 | 0.80 | 1.19 |
| 10 × 10 ft | 0.62 | 0.93 | 1.24 | 1.86 |
| 10 × 12 ft | 0.75 | 1.12 | 1.49 | 2.23 |
| 12 × 12 ft | 0.89 | 1.34 | 1.78 | 2.67 |
| 12 × 16 ft | 1.19 | 1.78 | 2.38 | 3.56 |
| 16 × 20 ft | 1.98 | 2.97 | 3.96 | 5.93 |
| 20 × 20 ft | 2.47 | 3.71 | 4.94 | 7.41 |
Cubic yards, rounded up to two decimals. Round up again to what your supplier will deliver.
Where the numbers come from
- Cubic yards are length times width times depth in feet, divided by 27. 1 cubic yard = 27 cubic feet, exact by definition, so the volume is arithmetic on your measurements and no figure here is ours to source.
Enter the depth of decomposed granite you will spread, and round the cubic yards up to what your supplier sells, whole or half yards. This page gives no tons: we have no published density for decomposed granite to cite, and its weight changes with how finely it is graded and how wet it is.
By Javier Miralles · Last updated . How this site is made.
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