Free tool
Pool volume calculator
Work out how many litres your pool holds. Choose the shape, enter the measurements in metres, and the calculator multiplies the surface area by the average depth.
Pool shape
Enter the measurements in metres to see the volume.
How to measure your pool
Measure the length and width
Measure the water surface at its longest and widest points, in metres. For a round pool, measure straight across the middle.
Measure the shallow and deep ends
Measure from the water line to the floor at the shallowest and deepest points. If the depth is the same everywhere, enter it twice.
Read the result
The calculator averages the two depths and rounds the result to the nearest 100 litres.
The formulas
| Shape | Surface area |
|---|---|
| Rectangle | Length × width |
| Round | 3.14 × radius × radius (radius is half the diameter) |
| Oval | 3.14 × half the length × half the width |
Freeform and kidney-shaped pools vary too much for one formula. Split the pool into rectangles and circles, work out each part and add them together.
Why the volume matters
Chemical product labels give amounts per volume of water, so an accurate volume is the starting point for every treatment. Follow the product label and your own training for the amount to add. In Chlor, the volume is saved on the pool record, so it is there at every stop. See water testing in Chlor.
Common questions
How many litres is a 10 x 5 metre pool?
A 10 x 5 metre rectangular pool that is 1 metre deep at the shallow end and 2 metres at the deep end holds about 75,000 litres: 50 square metres times an average depth of 1.5 metres, times 1,000.
How do I convert cubic metres to litres?
Multiply by 1,000. One cubic metre of water is 1,000 litres, and 1,000 litres is one kilolitre.
Is the result exact?
No. Steps, benches, sloping walls and the water level all change the real volume. The calculator gives a close estimate from tape-measure readings.
Does the calculator recommend chemical doses?
No. It only works out volume. Always follow the product label for chemical amounts.
Clear the admin off your route.
Chlor is in private beta with Australian pool businesses. Request access and we will set you up.