Gravel Calculator
Calculate how much gravel, crushed stone, sand or topsoil you need — by volume and weight.
Weights use typical loose densities and are estimates. Suppliers may sell by volume or by weight — check which before ordering.
About this tool
Enter the length, width and depth of the area and choose a material to get the volume in m³ or yd³ and the weight in tonnes or tons. Useful for driveways, paths, patios bases and garden beds.
Frequently asked questions
Multiply length × width × depth to get the volume, then multiply by the material's density to get the weight. A 5 × 4 m area at 5 cm deep is 1 m³, which is about 1.6 tonnes of gravel.
Around 5 cm (2 in) for decorative gravel and paths, 7–10 cm (3–4 in) for driveways on top of a compacted sub-base, and 10–15 cm (4–6 in) for a sub-base layer itself.
Loose gravel and crushed stone weigh roughly 1.5–1.7 tonnes per m³ (about 1.3–1.4 short tons per cubic yard). Wet material is heavier, so suppliers' figures can differ.
Gravel compacts and spreads into the ground, and sub-bases are rarely perfectly level. 5–10% extra avoids running short halfway through the job.
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