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Pond volume calculator
Roughly how much water your pond holds. Useful for working out a dose, or for sizing a pump or a filter.
Shape
Measure the water, not the liner — inside edge to inside edge.
Measurements
m
m
m
All measurements in metres. Depth is the average across the pond, not the deepest point.
Fill in the measurements
Still need length and width and average depth.
Ponds are rarely the shape the maths assumes. Sloped sides, shelves, rocks and baskets all take water out, so a real pond usually holds a little less than this. Treat it as a starting figure, and if you are dosing something, check which gallon the instructions mean.