Calculyn

Gravel Calculator

Estimate how many tons and cubic yards of gravel you need for a driveway or path.

ft
ft
in

Results update as you type.

Gravel needed

8.6tons
Cubic yards
6.17
Cubic feet
167
Estimated cost
$389
Gravel needed8.6

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Quick answer

A 50 × 10 ft driveway 4 inches deep needs 6.17 cubic yards, about 8.6 tons.

How it works

Multiply area by depth to get volume, then convert to tons using a typical gravel density of about 1.4 tons per cubic yard. Order 5–10% extra.

Formula

Tons = (L × W × Depth in ÷ 12) ÷ 27 × 1.4

Assumptions & limitations

  • Density of 1.4 tons per cubic yard (varies 1.3–1.5 by stone type)
  • No compaction or waste allowance

Formula and assumptions reviewed October 2026 by the Calculyn team. How we build our calculators

Frequently asked questions

How deep should driveway gravel be?

Usually 4–6 inches for the top layer, with a deeper base layer for new driveways.