How much gravel do I need?
Multiply driveway length by width and the chosen layer depth. The result is a geometric volume. Converting it to a purchase weight requires a bulk density for the actual material. This calculator shows cubic yards, cubic meters, metric tonnes and US short tons. The density input is editable because a single universal gravel weight would give misleading results for different products and conditions.
Worked example: a 50 × 10 ft surface
At four inches deep, a 50-foot by 10-foot rectangle contains approximately 166.67 cubic feet. That equals 6.17 cubic yards or 4.72 cubic meters. At the illustrative density of 1,600 kilograms per cubic meter, the mass is about 7.55 metric tonnes, or 8.32 US short tons. These are different units describing the same estimated mass, not alternative quantities of material.
Ask whether the quote is per ton or tonne
A metric tonne equals 1,000 kilograms. A US short ton equals approximately 907.18 kilograms. Suppliers may use the word ton without spelling out the system. Confirm the basis of the quote before comparing prices. This tool’s price field is explicitly per metric tonne. Convert a short-ton quote to the matching basis first; entering it unchanged would produce an incorrect cost comparison.
Loose material and compacted depth
The layer depth is a geometric input, not a recommendation for driveway construction. A specified compacted thickness may require more delivered loose material. The extra-volume input lets you model a supplier-confirmed purchasing allowance, but the tool does not choose a compaction factor. Material grading, moisture and handling can affect the relationship between delivered mass and installed depth.
Treat each layer separately
A driveway can have different base and surface materials. If density or thickness differs, calculate each layer separately and keep the quantities labeled. A single average density can conceal important differences. Drainage, subgrade preparation, geotextile and edge restraints are outside this volume model. The result is a purchasing estimate and cannot establish whether the proposed construction is suitable for the traffic or ground conditions.
Estimate the delivered subtotal
The cost output multiplies metric tonnes by the entered unit price and adds one delivery charge. It excludes tax, labor, equipment, minimum-load adjustments and additional trips. Confirm truck capacities and access restrictions with the supplier. If your order needs multiple deliveries, enter the combined charge or keep separate quotes. Example prices are arithmetic scenarios rather than current local market rates.
Questions and method
Can I enter gravel sold by cubic yard? Use the volume output directly and compare the supplier’s price outside the mass-based cost field. Is the default density verified for my stone? No, ask the supplier for the applicable value. Can this measure an irregular driveway? Split it into measured rectangles or another appropriate area takeoff, avoid overlap and combine volumes before applying purchase rounding.
Method and review: these examples follow the equations described above. Project planning guides and calculation context. Use the applicable supplier specification or institutional regulation for the assumptions. Written by Velour Trends · Updated 8 November 2026. Report a calculation issue.