Garden & outdoors
Pond volume calculator
Estimate capacity from surface dimensions and average water depth.
A clear answer. Here’s how.
Rectangular capacity = length × width × average depth. Elliptical capacity multiplies this by π/4. Converts m³ to litres. Use average water depth, not the deepest point; shelves and irregular edges can make this only an estimate.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- Surface shape
- Rectangle
- Water length (m)
- 3
- Water width (m)
- 2
- Average water depth (m)
- 0.6
Example result
- Volume
- 3,600 litres
- Cubic metres
- 3.6