Pool Volume Calculator
Computes swimming-pool water volume in litres and cubic metres from its dimensions.
Enter Values
Before you rely on this: First-pass guide only. Verify safety-critical or regulated work against the relevant standards, your project requirements and a qualified professional.
How to use this calculator
- Enter the length, width and average depth.
- Press Calculate.
How it works
Volume = length × width × average depth; ×1,000 gives litres.
Worked example
8 × 4 × 1.5 m. = 48 m³ = 48,000 litres.
Common mistakes
- Using the maximum depth as an average — sloping pools need the average of shallow and deep ends.
- Forgetting to convert to litres for dosing (1 m³ = 1000 L).
Frequently asked questions
How do I calculate pool volume?
Surface area × average depth gives cubic metres; multiply by 1000 for litres. For a sloping floor, average the shallow and deep depths.
Why do I need my pool volume?
Chemical dosing — chlorine, acid, salt — is based on water volume, so an accurate figure keeps the water balanced and safe.
What is the average depth?
For a pool that slopes from shallow to deep, average the two: (shallow + deep) ÷ 2. Use that as the depth here.
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Cite this tool
Zerdly. (2026). Pool Volume Calculator. Retrieved from https://www.zerdly.com/tools/pool-volume-calculator/
Tip: Enter any known values to calculate the remaining results.
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