Topsoil Calculator
Cubic metres/yards and tonnes of topsoil for beds and lawns.
125 bags hide inside every 5 m³ — bulk delivery wins above ~1 m³. Soil settles ~15% after spreading; mound it slightly proud.
Formula
Topsoil Calculator is a free topsoil calculator for civil engineers, contractors and quantity surveyors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Topsoil Calculator
Cubic metres/yards and tonnes of topsoil for beds and lawns. The calculation implements V = area × depth; ρ ≈ 1.3 t/m³ (moist screened) (Landscaping trade practice). 125 bags hide inside every 5 m³ — bulk delivery wins above ~1 m³. Soil settles ~15% after spreading; mound it slightly proud.
How to use Topsoil Calculator
- 1Enter Area to cover in m².
- 2Enter Soil depth in mm (New lawn 100–150 · top-dress 25 · veg beds 250+).
- 3Read Volume, Weight, 40 L bags instantly — no submit button needed.
- 4Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Topsoil Calculator?
- ✓Implements the standard formula — V = area × depth; ρ ≈ 1.3 t/m³ (moist screened)
- ✓Reference cited on-page: Landscaping trade practice
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Topsoil Calculator use?+
It computes V = area × depth; ρ ≈ 1.3 t/m³ (moist screened), per Landscaping trade practice. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
125 bags hide inside every 5 m³ — bulk delivery wins above ~1 m³. Soil settles ~15% after spreading; mound it slightly proud.
Does it include wastage?+
Yes — standard wastage/bulking factors are built in and stated in the formula line, so the quantity is an orderable number, not a bare geometric volume.
Is the Topsoil Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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