Compost Calculator
Garden Area (m²)
Depth
Depth Unit
A compost or mulch calculator determines how many litres or bags are needed to cover a garden area at a target depth. Compost improves soil structure, moisture retention, and microbial life.
- 1Volume = Length × Width × Depth (all metres)
- 2Litres = m³ × 1,000
- 3Standard 40L bag covers 40cm × 40cm × 25cm
- 4Add 10% for settling after watering
15m × 2m bed, 8cm deep=Volume = 2.4m³ = 2,400L ≈ 60 × 40L bags
| Area | 5cm depth | 8cm depth | 10cm depth |
|---|---|---|---|
| 10m² | 500L | 800L | 1,000L |
| 20m² | 1,000L | 1,600L | 2,000L |
| 50m² | 2,500L | 4,000L | 5,000L |
References
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