Swimming Pool Volume Calculator
Calculate your pool's exact volume for accurate chemical dosing, heating cost estimates, and filter sizing. Works for rectangular, oval, and circular pools.
Pool Volume Guide
Why Accurate Volume Matters
Pool chemical doses are calculated per 1,000 litres. An error in your volume leads to under or over-dosing — both cause water clarity and safety problems. For pools with a graduated slope, average the deep and shallow depths.
Fill Time and Water Cost
A standard garden hose delivers 15–25 litres/minute. A 50,000-litre pool at 20L/min takes approximately 42 hours to fill. Check your water supplier's garden tap metered rate — filling a pool can add £50–200 to a water bill.
Initial Chemical Dosing
Chlorine: 2g per 1,000 litres for initial dosing to achieve 1–3 ppm. pH: Aim for 7.2–7.6. Alkalinity: 80–120 ppm. Always test water chemistry before and after adding chemicals — never estimate.
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