Tool
Landscape volume calculator
Pop in three measurements and get your order quantity in cubic metres, plus a rough weight in tonnes. Handy for soil, mulch, sand, stone, aggregate and road base.
Order roughly
{{ vol }} m³
Area {{ area }} m² · approx. {{ tonnes }} tonnes · includes 5% extra for settling
The maths behind the number
We multiply length × width × depth, all converted to metres (so a 100mm depth counts as 0.1m), then add 5% for settling and uneven ground. Tonnes come from typical bulk densities; treat them as a guide, since wet material weighs more.
| Material | Typical depth | Coverage per m³ | Rough tonnes per m³ |
|---|---|---|---|
| Mulch | 75–100mm | 10–13 m² | 0.3–0.4 |
| Garden soil | 200–300mm | 3–5 m² | 1.1–1.3 |
| Under turf soil | 75–100mm | 10–13 m² | 1.2–1.4 |
| Top dress | 5–10mm | 100–200 m² | 1.2–1.4 |
| Sand | 20–100mm | 10–50 m² | 1.4–1.6 |
| River stone | 50–100mm | 10–20 m² | 1.5–1.7 |
| Aggregate | 50–100mm | 10–20 m² | 1.4–1.6 |
| Road base | 100–150mm | 7–10 m² | 1.8–2.0 |
These densities are typical industry figures, not measurements of our own products.
Describe the job. We’ll work out the quantity.
Tell us what you need, how much of it and where it’s going, and we’ll reply with a price and a delivery time.