Free project planning tool
Estimate gravel volume, weight, full bag quantity, and material cost for driveways, paths, and landscape bases.
Formula
A 12 × 10 ft area at 3 in deep is 30 cubic feet before extra allowance. With 10% extra and gravel at 100 lb per cubic foot, the estimate is about 1.65 short tons or 66 full 50 lb bags.
Common questions
Depth depends on the project and base conditions. Decorative paths may use a shallower layer than driveways, which commonly require a prepared base and multiple material layers.
Weight varies by stone size, moisture, and compaction. A common planning range is roughly 1.3–1.5 short tons per cubic yard, but supplier values are more reliable.
Use the extra allowance field to cover compaction, settlement, and minor grade variation. Confirm the final order with the material supplier.