Example 1 — Lawn area
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15.12 m³
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Topsoil / soil calculator
Estimate topsoil for lawns, beds or levelling — layer depth, waste and tonnes or bags.
Topsoil ≠ compost ≠ fill dirt. Match density to what you are buying. Related: floor / plot area, gravel.
Results
Enter data and click Calculate.
How results are calculated
V = length × width × depth × (1 + waste/100). Mass = V × topsoil density. Optional bags / bulk bags.
Density stays in kg/m³ even with US length units — common for bulk deliveries. Mass is an estimate: moisture and compaction can change it.
How to use this calculator
- Enter area dimensions and layer depth.
- Set waste % for settlement and spreading.
- Pick a soil density preset or custom kg/m³.
- See volume, tonnes and cost.
Practical tips
- Lawn: often about 100–150 mm of quality topsoil over prepared subgrade.
- Beds: often 200–300 mm — volume rises quickly with depth.
- Levelling: enter average fill depth; split large slopes into zones.
Usage examples
Example 2 — Garden beds
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2.64 m³
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Example 3 — Levelling strip
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3.15 m³
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Frequently asked questions
Question 1
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Question 8
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