Topsoil Calculator
Estimates topsoil volume in cubic metres needed for a garden or landscaping area.
Enter Values
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Enter the length, width and depth.
- Press Calculate.
How it works
Volume = length × width × depth in cubic metres.
Worked example
10 × 2 × 0.15 m. = 3 m³.
Common mistakes
- Confusing loose and settled volume — soil compacts, so order a little extra.
- Mixing area and depth units; keep both metric or both imperial.
Frequently asked questions
How much topsoil do I need?
Multiply the bed area by the depth you want. A 20 m² bed at 100 mm deep needs 2 m³ of topsoil.
How deep should topsoil be?
Around 100–150 mm suits lawns and garden beds; about 300 mm for vegetable beds and where you want strong root growth.
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Cite this tool
Zerdly. (2026). Topsoil Calculator. Retrieved from https://www.zerdly.com/tools/topsoil-calculator/
Tip: Enter any known values to calculate the remaining results.
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