Gravel Calculator
Find the volume of gravel needed to cover an area to a depth you choose.
Worked example
A drive 20 m long and 3 m wide covers 60 m². Spread 5 cm deep, it needs 60 × 0.05 = 3 m³ of gravel, which is 3,000 litres.
How we calculated this
The volume of gravel is the area you want to cover multiplied by the depth of the layer. Each measurement is converted exactly before the multiplication, so you can mix metric and imperial units. The result is shown in cubic metres, cubic feet and litres.
This page gives a volume, not a weight. Gravel, sand and crushed stone all weigh different amounts for the same volume, and the weight changes with moisture and how tightly the material is packed, so this calculator does not guess a density. Your supplier can tell you the weight of a cubic metre of the material you choose.
A result written as a plain number is exact. A result starting with “≈” has been rounded to 10 significant figures, because its exact decimal never ends or is too long to read comfortably. When an exact value is long, its full digits are shown underneath. The calculation itself is never rounded: only the display is.
What this result means
The result is the volume of gravel needed to cover the area to the depth you entered.