Free Gravel Calculator - Calculate Material Needs
Calculate how much gravel you need for your project with multiple depth scenarios.
Formula & Methodology
By determining the total cubic volume of the space and multiplying it by the specific density of the aggregate material, you can accurately estimate total tons or required bags.
- Volume = Area × Depth
- Weight = Volume × Density
Worked Example
Using the Gravel Calculator: apply the formula above to your input values. For instance, Volume = Area × Depth, then Weight = Volume × Density. The tool performs each step instantly and shows the result.
Frequently Asked Questions
How much gravel do I need?
It multiplies area by depth to get volume, then converts to tons using gravel’s typical density of about 1.4 tons per cubic yard.
How deep should a gravel layer be?
Driveways often need 4-6 inches, while paths and decorative beds may only need 2-3 inches of coverage.
Should I order extra gravel?
Yes. Add around 10% for settling, compaction and uneven ground so you avoid a second delivery.