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Pool Volume Calculator

Volume of a swimming pool in litres and gallons

Tank Volume Calculator

A pool volume calculator computes the water capacity of a swimming pool in litres, gallons, or cubic metres. This is essential for dosing chemicals correctly — the right amount of chlorine depends entirely on water volume.

  1. 1Rectangular pool: Length × Width × Average depth × 1,000 = litres
  2. 2Oval pool: Length × Width × π/4 × Average depth × 1,000
  3. 3Average depth = (shallow end depth + deep end depth) / 2
  4. 4For curved or irregular pools, break into rectangles or use the pool's own measurement
Pool 8m × 4m · avg depth 1.5m=48,000 litres (48 m³)8×4×1.5×1000 = 48,000 L

Fun Fact

Properly dosing pool chemicals requires knowing volume to the nearest thousand litres. Under-dosing chlorine causes algae; over-dosing irritates skin and fades swimwear.

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