Pool Water Volume Calculator
Work out how many litres of water your pool holds. Enter the dimensions and the calculator returns the volume, which you need for dosing chemicals and sizing pumps and heaters.
How we estimate this
Pool volume is length × width × average depth, converted to litres (1 cubic metre is 1,000 litres). For a pool that slopes from a shallow to a deep end, the average depth is roughly the two depths added and halved.
Pricing reviewed: October 2026.
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Pricing reviewed October 2026. Indicative Australian costs, not a quote.
Understanding pool water volumes in Australia
Pool volume is length × width × average depth, converted to litres (1 cubic metre is 1,000 litres). For a pool that slopes from a shallow to a deep end, the average depth is roughly the two depths added and halved.
Knowing your exact volume matters, under-dosing chemicals leaves the water unsafe, and over-dosing wastes money and can irritate swimmers. It also determines the right size pump, filter and heater.
Frequently asked questions
How do I calculate my pool's water volume?
Multiply length by width by average depth (in metres), then by 1,000 to get litres. For a sloping pool, average the shallow and deep end depths.
Why do I need to know my pool volume?
To dose chemicals correctly and to size the pump, filter and heater. Getting the volume wrong means wasted chemicals or unsafe water.
Are you a pool / pool-shop business?
Everyone on this page is working out what pool water volume costs because they are ready to hire. Put your business right beneath the calculator, in your state, so you are who they find. From $50/mo.