Find out exactly how much water your swimming pool holds. Choose the pool shape, enter the dimensions and depths, and get the volume in cubic metres, litres and gallons — free, private, and with no sign-up.
Volume uses the average of the shallow and deep end depths; the salt estimate assumes 3,500 ppm salinity.
How to Use
- Choose your pool shape — rectangular, circular or oval — and the units you measured in.
- Enter the length (or diameter), width and the depths of the shallow and deep ends.
- Read the live results: volume, surface area, water weight and a salt estimate for saltwater pools.
Key Features
- Three pool shapes — rectangular, circular and oval, with inputs that adapt to your choice.
- Sloped floors handled — enter shallow and deep end depths and the average is used.
- Metric and imperial — work in metres or feet.
- Salt estimate included — handy when setting up a saltwater chlorinator.
- 100% private — everything is calculated in your browser and never sent to a server.
FAQs
Is this pool volume calculator free to use?
Yes. The calculator is completely free with no sign-up, no usage limits and no hidden charges.
How is the average depth worked out?
The calculator averages your shallow end and deep end depths, which is the standard approach for pools with a uniformly sloping floor. For pools with a more complex profile, measure the depth at several points and enter the overall average.
What is the salt estimate based on?
It assumes a salinity of 3,500 parts per million, a common level for residential saltwater pools. Always check your chlorinator manufacturer’s guidance and test the water before adding salt.
Is my data uploaded or stored anywhere?
No. All calculations happen locally in your browser using JavaScript, so your inputs never leave your device.
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