Gravel Calculator
Enter the area and depth of your gravel bed. The calculator returns the volume in cubic yards and converts it to tons (gravel weighs about 1.4 tons per cubic yard) so you can order by weight.
Your measurements
ft
ft
in
$
Coverage
- Surface area
- 400 ft²
- Depth
- 4 in
Order this
- Weight
- 6.91 tons
- Cubic feet
- 133.33 ft³
Gravel needed
4.94 yd³
≈ 6.91 tons
Estimates only. Order a little extra for waste and verify against your supplier's coverage figures.
The formula
Tons = (Length ft × Width ft × Depth ft ÷ 27) × 1.4 tons/yd³
Example: A 40 ft × 10 ft driveway at 4 in deep = 4.94 yd³ ≈ 6.9 tons of gravel.
How it works
- 1Calculate the volume in cubic yards (area × depth ÷ 27).
- 2Multiply by ~1.4 to convert cubic yards to tons for crushed gravel.
- 3Suppliers usually sell gravel by the ton, so order by weight.
Frequently asked questions
How deep should a gravel driveway be?
Plan for 4–6 inches for a residential driveway, often in two layers: a coarser base and a finer top layer.