How to Use the Gravel Calculator
- Measure the length and width of the area.
- Enter the depth or thickness you need and choose a unit for each measurement.
- Add waste or extra material when the job calls for it, then review the volume estimate.
Gravel Calculation Formula
Convert all dimensions to feet, multiply length by width by depth, then divide cubic feet by 27 to get cubic yards. One cubic foot equals approximately 0.0283 cubic meters.
Worked Example
A 10 ft by 10 ft area covered to 4 inches has a base volume of 33.33 cubic feet, or about 1.23 cubic yards, before any waste allowance.
How Much Gravel Do I Need?
Gravel orders should account for material type, moisture, compaction, and delivery access. Use the weight result as an estimate only and confirm the supplier density before ordering by ton.
Unit Conversions
Frequently Asked Questions
What does the gravel calculator measure?
Estimate gravel volume, weight, and tons while accounting for material density and waste.
Which units can I use?
Enter each dimension in inches, feet, yards, centimeters, or meters. The results are shown in cubic feet, cubic yards, and cubic meters.
Should I add extra material?
Add a waste allowance when cutting, settling, spillage, or uneven ground may affect the amount you need. The calculator shows the allowance used.
How much gravel do I need?
Gravel orders should account for material type, moisture, compaction, and delivery access. Use the weight result as an estimate only and confirm the supplier density before ordering by ton.
What gravel depth should I use for a driveway?
Driveway depth depends on the subgrade, traffic, and layer type; many projects use separate base and surface layers. Calculate each layer separately and confirm the specification locally.
Why can the calculated gravel tonnage differ from the delivery weight?
Gravel density changes with stone size, moisture, and compaction. The gravel calculator uses the density you enter, so use your supplier’s current density for a closer tonnage estimate.