Pool Volume Calculator: How Many Litres to Fill Your Pool?
Choose the shape, enter the size and depth, and see the volume in litres and cubic metres, plus tankers and filling time.
- Nothing you type is stored
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Pool volume
70,000litres
- Cubic metres
- 70 m³
- Cubic feet
- 2,472 ft³
- Water surface
- 50 m²
- Tankers needed
- 7
At this flow it takes about 11.7 hours to fill.
How to use
- Choose rectangle, round or oval, and metres or feet.
- Enter length and width (or diameter) and the shallow and deep end depths.
- Read litres, cubic metres and how many tankers. Add your pump's flow under More options.
Good to know
Volume = surface area × average depth. For a 10 × 5 m pool that is 1 m deep at one end and 1.8 m at the other, the average depth is 1.4 m, so 50 m² × 1.4 m = 70 m³ = 70,000 litres (1 m³ = 1,000 litres).
Round pool area = π × diameter² ÷ 4; oval area = π × length × width ÷ 4. For a pool with a uniform depth, enter the same value in both depth boxes. The same method works for an underground sump or a rectangular water tank.
Tanker counts use 10,000 litres by default — edit it for 5,000 or 12,000 litre tankers. Fill time = litres ÷ flow; a 100 L/min pump fills 70,000 litres in about 11.7 hours. Real pools are filled a few cm below the edge, so actual water is a little less.
Questions
How do I calculate pool volume in litres?
Multiply length × width × average depth in metres, then × 1,000. 10 × 5 × 1.4 = 70 m³ = 70,000 litres.
How many tankers to fill a pool?
Divide the litres by the tanker size. 70,000 litres needs 7 tankers of 10,000 litres.
What if the pool has a slope?
Enter the shallow and deep end depths. The calculator uses the average, which is right for an even slope.
Can I use feet?
Yes. Choose feet and enter all sizes in feet. 1 cubic foot = 28.3 litres.
Does this work for a water tank?
Yes. Use rectangle or round and enter the inside size and water depth.