What Is a Gravel Calculator?
This calculator estimates how much gravel you need for a driveway, path, or landscaping project, in cubic yards and approximate weight in tons, based on the area's dimensions and desired depth.
How to Use the Gravel Calculator
- Enter the length and width of the area in feet.
- Enter your desired gravel depth in inches.
- Optionally enter cost per ton for a price estimate.
Gravel Calculation Formula
Worked Example
Volume: 20 × 10 × (3÷12) = 50 cubic feet
Cubic yards: 50 ÷ 27 ≈ 1.85 yd³
Approximate weight: 1.85 × 1.4 ≈ 2.6 tons
Understanding Your Results
Gravel is typically sold by weight (tons) rather than volume, so the weight conversion helps when ordering. Actual gravel density varies by type (crushed stone, pea gravel, etc.), so 1.4 tons per cubic yard is a reasonable general estimate — check with your supplier for material-specific density.
Common Mistakes to Avoid
- Not accounting for compaction — gravel settles over time, so slightly more than the calculated amount may be needed for lasting coverage.
- Using an incorrect density assumption for specialty gravel types, which can vary meaningfully.
Frequently Asked Questions
Calculate the area's square footage, multiply by your desired depth (converted to feet), then divide by 27 to get cubic yards — this calculator does that automatically.
Roughly 1.4 tons per cubic yard for typical gravel, though this varies by specific material — check with your supplier for precise density.
Common recommendations range from 4-6 inches for driveways, though this varies based on expected traffic and base preparation — check local guidance for your specific project.
Yes — ordering slightly more than calculated accounts for compaction and settling over time, ensuring adequate long-term coverage.
Yes — crushed stone, pea gravel, and other materials have different densities, so actual weight per cubic yard can vary from the general estimate used here.