BuildRuler

Build & DIY estimates

Gravel calculator

Quick answer: Cubic yards of gravel = length × width (ft) × depth (in) ÷ 324, and tons = cubic yards × density, about 1.4 tons per cubic yard for typical gravel. Example: a 10 × 10 ft area at 4 inches deep needs 1.23 cubic yards, or roughly 1.7 tons. Add about 10% for compaction and uneven ground.

  • Manufacturer bag yields · published coverage rates
  • Updated
  • Reviewed by Alex · How we calculate

Default density 1.4 tons per cubic yard; check with your supplier.

From yards to tons

One cubic yard is 27 cubic feet. Crushed stone weighs roughly 1.3 to 1.5 tons per cubic yard depending on size and moisture, so suppliers who sell by the ton will convert for you. A 10 × 20 ft area 4 inches deep is 2.47 cubic yards, about 3.5 tons.

Typical depths

About 2 inches for a decorative top layer over a base, 4 inches for a walkway or patio base, and 4 to 8 inches in compacted layers for a driveway base. Compaction reduces depth, so add 10% or more for a compacted base.

Frequently asked questions

How deep should driveway gravel be?

Often 4–6 in over a compacted base; ask a local supplier.

How many bags make a yard?

At 0.5 cubic feet per bag, 54 bags make a cubic yard.

Should I use landscape fabric?

It helps keep gravel from mixing into the soil under paths.