Topsoil Calculator
Work out topsoil volume and bag count for a bed or lawn area.
Quick answer: enter your details below and click Calculate Topsoil — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Enter your details below.
How to use
- Measure the length and width in metres.
- Enter the depth in centimetres.
- Click Calculate Topsoil.
About this tool
Enter length, width, and depth, and the tool gives the volume in cubic metres and the number of 25-litre bags that volume needs, with a 10 percent allowance shown separately. Bulk topsoil is usually ordered by the cubic metre, so both figures are useful.
Frequently asked questions
Is bagged or bulk cheaper?
For more than a cubic metre or so, bulk delivery is usually far cheaper per litre.
How deep should new topsoil be?
For lawns, around 10 to 15 cm of good topsoil over the subsoil is a common target.