Gravel estimator & coverage calculator
Estimate how much gravel you need for a driveway, path, pad, garden area or base layer. Enter the dimensions and depth, then adjust density, waste and price to match the aggregate you are actually buying.
Interactive tool
Planning estimate only. Verify measurements, material specifications, densities, package coverage and supplier pricing before ordering.
Visual guide
See the measurement path before using the formula. The visual separates area, depth, volume and purchase units so the calculation is easier to verify.
Practical guide
The number is only useful when the inputs describe the actual project. These are the assumptions that most often change the result.
The calculator turns project dimensions into square footage, cubic feet and cubic yards, then converts volume into estimated tons using the density you enter. It also applies a waste allowance and can estimate material cost. This covers the core workflow used by strong gravel calculators, while keeping density visible instead of hiding it behind a fixed assumption.
A cubic yard is a volume, while a ton is a weight. Different aggregate sizes, stone types, moisture conditions and compaction levels can change the tons-per-cubic-yard value. Use the supplier density for the product you are buying whenever it is available.
Measure the finished footprint, choose the installed depth, then decide whether the project needs extra material for grading, compaction or edge loss. For driveways and structural base layers, the required layer design can depend on soil, drainage and traffic, so quantity calculation should not be treated as pavement design.
Calculation guide
Measure the surface area, convert the planned gravel depth to the same unit system, calculate volume, then multiply by the selected bulk density when you need a tonnage estimate. Because gravel density varies by stone type, size, moisture and compaction, the density field is editable.
Enter length and width for a rectangular project, or use the known-area field when you already have square footage, square yards, square metres or acres.
Use the finished layer depth you actually plan to install. The calculator converts inches, feet, centimetres or metres into a consistent volume calculation.
Area multiplied by depth gives cubic volume. The tool shows cubic feet and cubic yards so you can compare bulk supplier units without doing another conversion.
Where relevant, apply density for tons, bag size for bag counts, waste or compaction allowances, and your local unit price for an estimated material cost.
Worked example
A 10 ft × 10 ft area at 2 in deep has 16.67 ft³ of volume, or about 0.62 yd³. At an editable planning density of 1.4 tons/yd³, that is about 0.86 tons before waste.
Reference values
Use this table for quick planning checks. Calculator inputs remain the better choice when your dimensions, depth, density, waste or product coverage differ.
| Area | 2 in Gravel | Approx. Tons* |
|---|---|---|
| 100 ft² | 0.62 yd³ | 0.86 tons |
| 200 ft² | 1.23 yd³ | 1.73 tons |
| 300 ft² | 1.85 yd³ | 2.59 tons |
| 400 ft² | 2.47 yd³ | 3.46 tons |
| 500 ft² | 3.09 yd³ | 4.32 tons |
| 600 ft² | 3.70 yd³ | 5.19 tons |
| 700 ft² | 4.32 yd³ | 6.05 tons |
| 800 ft² | 4.94 yd³ | 6.91 tons |
| 900 ft² | 5.56 yd³ | 7.78 tons |
| 1,000 ft² | 6.17 yd³ | 8.64 tons |
*Weight values use editable planning defaults shown in the calculator. Supplier density should be used for ordering.
People also ask
Overlapping questions are consolidated so each answer covers a distinct calculation or planning issue.
Multiply length by width to get area, multiply by depth to get volume, convert to cubic yards if needed, then use the material density for a weight estimate. Add a waste allowance for grading and compaction.
No. A ton is weight and a cubic yard is volume. The number of tons per cubic yard depends on gravel density, so use the density supplied by your material vendor when accuracy matters.
Coverage depends on depth. Divide the available cubic volume by the chosen depth to find area. A thinner layer covers more area than a thicker one.
You also need depth. At 2 inches deep, a 10 ft × 10 ft area is about 0.62 cubic yards before waste.
Coverage depends on the bag product density and layer depth. Use the bag volume printed by the manufacturer when available rather than assuming every 50 lb bag occupies the same volume.
Formulas are shown on the page and variable assumptions are exposed as inputs where they affect the result. Unit relationships are checked against FHWA Gravel Roads Construction & Maintenance Guide. Material density, packaging, product coverage and pricing should be verified with the supplier for the material actually being purchased.