FREE POND CALCULATOR
Pond Volume Calculator
Enter your pond's measurements to estimate how much water it holds in litres and UK gallons.
Estimated pond volume
Enter your measurementsYour result will appear here.PONDSTUFF GUIDE
How to calculate pond volume
Pond volume is simply an estimate of the amount of water contained within your pond. For a straightforward rectangular pond, volume can be calculated from its length, width and average depth.
Why use average depth?
Garden ponds rarely have perfectly flat bottoms. Shelves, planting areas and deeper sections mean that using only the deepest point can significantly overestimate the amount of water present.
What if my pond is an irregular shape?
Irregular ponds are harder to measure precisely. Our calculator applies an adjustment to a rectangular estimate to account for the missing corners and curved edges typical of natural-shaped garden ponds. The result should therefore be treated as an approximation.
Litres or gallons?
Pond equipment sold in the UK may quote capacities in litres or gallons. PondStuff displays both litres and imperial UK gallons so you can compare the result with the specifications provided for your equipment.