Gravel Calculator for Driveways
Plan a gravel driveway or refresh by estimating cubic yards and tons from surface dimensions and depth.
Build the Estimate
Measurement controls, project presets, and a material result card for this calculator.
Formula and Assumptions
Cubic yards = length x width x depth feet / 27. Tons = cubic yards x tons per cubic yard.
- A common gravel density estimate is 1.4 tons per cubic yard.
- Compaction and base preparation can change final needs.
Worked Example
- 50 ft driveway length
- 12 ft driveway width
- 4 inch gravel depth
- 1.4 tons per cubic yard
Four inches is 0.333 ft, so the driveway volume is 50 x 12 x 0.333, or about 200 cubic feet. That is 7.4 cubic yards.
At 1.4 tons per cubic yard, the driveway needs about 10.4 tons before compaction and delivery rounding.
Measurement Tips
- Measure driveway length and average width in feet.
- Convert depth from inches to feet before calculating cubic yards.
- Increase allowance for soft spots, low areas, and compacted base layers.
Buying Notes
- Ask suppliers how they convert cubic yards to tons for the chosen stone.
- Round delivery quantities to the supplier minimum and truck capacity.
Common Mistakes
- Forgetting that compacted gravel settles below loose volume.
- Using mulch depth rules instead of driveway base depth requirements.
Frequently Asked Questions
Is this gravel calculator for driveway exact?
No. It is an estimate based on common project formulas and the assumptions shown on the page. Always confirm package labels and local conditions before buying materials.
Should I add extra material?
Most projects need extra material for cuts, waste, damaged pieces, uneven surfaces, or future repairs. The calculator includes a waste factor where it matters.
Can I print the result?
Yes. Use the print action on the page to keep a simple copy of the inputs, formula, and estimated material list.