Topsoil Calculator
Calculate the volume and weight of topsoil needed to cover an area at a given depth.
- Free to use
- Accurate results
- No registration required
- Works on all devices
Enter your area's length, width, and desired topsoil depth to find the volume and weight needed.
1100-1300 kg/m³ is typical for topsoil, depending on moisture and composition.
Your result
7.5
Volume
Weight (tonnes)9
Weight (kg)9,000
AI explanation
Formula
Volume = length × width × depth; weight = volume × densityWorked example
10m × 5m garden bed, 15cm deep
| Field | Value |
|---|---|
| Area length (m) | 10 |
| Area width (m) | 5 |
| Depth (cm) | 15 |
| Topsoil density (kg/m³) | 1200 |
| Volume | 7.5 |
| Weight (kg) | 9000 |
| Weight (tonnes) | 9 |
Assumptions
- Topsoil density varies significantly with moisture content and organic matter — 1200 kg/m³ is a commonly cited average; damp soil can weigh noticeably more.
Frequently asked questions
How deep should topsoil be for a new lawn or garden bed?
10-15cm is typical for a lawn; vegetable garden beds often benefit from 20-30cm of good topsoil.
Why does topsoil weight vary so much?
Moisture content has a large effect — wet topsoil can weigh significantly more than dry topsoil of the same volume, so treat the weight figure as an estimate.
Is topsoil sold by weight or volume?
Both, depending on the supplier — this calculator gives you both figures so you can order either way.