Gravel & stone calculator
Estimate material for a measured area and depth, then convert to weight using the density supplied for your actual aggregate. Leave density blank if you only need cubic yards.
The interactive calculator requires JavaScript. The formula and worked example below are available without it. No sign-up is required.
How to use this calculator
- Enter the measured area and the material depth for your approved project plan.
- Add a supplier-confirmed bulk density if you need a weight estimate.
- Confirm loose versus compacted depth and delivery rounding before placing an order.
The formula
Cubic feet = area in square feet × depth in inches ÷ 12. US short tons = cubic feet × density in pounds per cubic foot ÷ 2,000.
Worked example
A 20 × 10 ft area at 3 inches deep is 50 cubic feet, or about 1.852 cubic yards. At an illustrative density of 100 lb per cubic foot, it weighs 2.5 US short tons. Confirm the real density before ordering.
A yard is volume; a ton is weight
Different aggregates do not weigh the same per cubic yard. Product size, moisture, and packing matter. Vulcan’s aggregate estimator also treats density as an input. This tool avoids silently assigning one density to every stone.
Compaction is a project input
The result does not determine the base thickness for a patio or driveway. Ask your installer or supplier how the specified compacted layer translates into loose delivered material, then enter any agreed allowance.
Plan the drop and the haul
A volume estimate does not confirm that a trailer or truck can carry the load. Check the actual payload limit, supplier weight, access width, and drop location. Separate material quantity from transportation and installation planning.
Common questions
How many tons are in a cubic yard of gravel?
There is no single value for every gravel. Multiply 27 cubic feet by the supplier density in lb per cubic foot, then divide by 2,000 for US short tons.
Does this calculator include compaction?
No hidden compaction factor is added. Enter an explicit allowance only when your supplier or project specification calls for it.
Are the results metric tonnes?
No. Weight is in US short tons of 2,000 pounds. Confirm the units used on your supplier’s quote.
Sources & method
Calculations use the formulas shown above. These references inform the planning guidance; they do not endorse this tool. References checked on .
Keep planning
- Topsoil & raised bed calculator
- Contractor job cost & margin calculator
- Discuss a hardscape or drainage project
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