Gravel and mulch calculator

How it works

Length × width × depth gives the volume. Gravel is sold by volume or by weight; most gravel and crushed stone weighs roughly 1.5 to 1.7 tonnes per cubic metre, so the calculator shows a weight range. Your supplier can tell you the exact figure for their stone. Mulch and bark are usually sold by volume or in 2 cu ft bags.

Worked example

Worked example: a path 30 ft long and 3 ft wide with 2 in (0.167 ft) of gravel needs 30 × 3 × 0.167 = 15 ft³, which is 0.56 yd³ or 0.42 m³, roughly 0.6 to 0.7 tonnes.

The results are estimates for planning and shopping. Check your measurements, and buy a little extra rather than too little.