Plan gravel for driveways, paths, drainage zones and base layers using an editable depth and waste factor.
Results use your measurements and editable assumptions. Verify product coverage, density, waste and order rounding with the supplier before purchasing.
Tons = volume in cubic feet × assumed density ÷ 2,000.
BuildCalc converts measurements to a consistent internal unit, applies your project geometry and only then adds the selected waste allowance. Packaging quantities are rounded up because partial bags, blocks or boxes usually cannot be ordered.
Gravel may be sold by weight or volume, so this tool reports both. Measure the coverage area, enter the intended finished depth, and replace the default density or pricing assumptions with local supplier information when available. Moisture, aggregate size and compaction can all change delivered weight.
At a 3 in depth, a 20 ft by 10 ft area contains 50 cubic feet, or about 1.85 cubic yards, before waste. At an assumed density of 105 lb per cubic foot, that is about 2.63 tons before the selected allowance.
Tons measure weight while yards measure volume. Aggregate size, rock type, moisture and compaction change the density and therefore the weight.
Use the required finished depth, then ask the supplier or project specification how much loose material is needed to achieve it after compaction.
Published and maintained by EasyTool.me. Review the calculation methodology, verify product-specific values with the supplier, and report reproducible corrections. Last materially reviewed August 16, 2026.