Topsoil Calculator
Estimate how much topsoil you need from the area and depth, with tonnes, bulk bags and litre bag equivalents.
Topsoil weight changes with moisture and composition.
Enter your measurements and press Calculate topsoil.
Topsoil volume calculation
Length × width × depth gives the volume required. The calculator converts the result into litres and uses the chosen density to estimate tonnes and bulk bags.
Choosing a soil depth
The appropriate depth depends on whether you are topping up an existing lawn, filling a raised bed or establishing a new planting area. Use the specification for your particular project rather than assuming one depth suits every use.
This is a quantity estimate. Soil quality, composition, settlement and suitability for planting should be checked separately.
Frequently asked questions
How many litres are in one cubic metre?
One cubic metre equals 1,000 litres.
Why is the weight approximate?
Wet soil is heavier than dry soil and the blend of mineral material and organic matter also changes bulk density.