Pool volume calculator (litres)
A rectangular pool 8 metres long and 4 metres wide, sloping from 1 m to 2 m deep, holds about 48,000 litres of water, or 12,700 US gallons.
Set the calculator to metres and litres, enter your pool's shape and measurements, and it works out the volume every chemical dose is based on.
Litres by pool size
| Pool size | 1.2 m average depth | 1.4 m average depth | 1.6 m average depth |
|---|---|---|---|
| 6 × 3 m | 21,600 L | 25,200 L | 28,800 L |
| 7 × 3.5 m | 29,400 L | 34,300 L | 39,200 L |
| 8 × 4 m | 38,400 L | 44,800 L | 51,200 L |
| 9 × 4.5 m | 48,600 L | 56,700 L | 64,800 L |
| 10 × 5 m | 60,000 L | 70,000 L | 80,000 L |
| 12 × 6 m | 86,400 L | 100,800 L | 115,200 L |
Round above-ground pools hold less than their diameter suggests: a 4.5 m round pool with 1.2 m of water holds about 19,200 litres, and a 5.5 m one about 28,600 litres.
How to measure in metres
Measure length and width at the water line, not over the coping. For depth, measure from the water surface to the floor at the shallowest and deepest points; the calculator averages the two. If the floor has a long flat shallow section and a short deep hole, measure at a few points along the pool and average them instead. A cubic metre is 1,000 litres, so a rough check is length × width × average depth × 1,000.
Why the number matters
Chlorine, salt and acid are all dosed by volume, so a pool guessed at 50,000 litres that really holds 40,000 is overdosed by a quarter every time. Round your answer to the nearest 2,000 litres, write it inside the pump shed, and use it in the chlorine calculator in litres and the salt calculator. For a standard above-ground pool, the pool sizes pages list the volume for common diameters, and the pool volume calculator is this same tool with feet and gallons in front.