Soil Volume Calculator
Use our free soil volume calculator to work out exactly how much compost or soil you need for planters, raised beds, and garden projects.
Results shown in litres and standard 40L compost bags.
How to calculate how much soil you need
To calculate how much soil you need for a planter or raised bed, multiply the internal length, width, and depth, then divide by 1,000 to convert cubic centimetres into litres.
This calculator does the maths instantly and converts the result into standard 40L compost bags.
Soil calculator for wooden planters
Ideal for wooden planters, decking planters, and raised beds. Measure internal dimensions and allow extra soil for liners or drainage.
Looking for a planter? View our wooden planters