Pool Volume Calculator
Know your pool’s volume for chemicals and filling costs.
Your numbers
Your results
Volume (cu ft)
Volume (cu ft)
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US gallons
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Liters
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Time to fill at 10 gal/min (hours)
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Pool Volume Calculator by TheCalcTools
How the Pool Volume Calculator works
Choose the pool shape and enter its dimensions.
Volume is surface area × average depth.
One cubic foot holds about 7.48 US gallons.
The formula
Rectangular: L × W × DRound: π × (diameter ÷ 2)² × D
Worked example
Using the default values shown in the calculator:
| Shape | Rectangular |
|---|---|
| Length or diameter (ft) | 32 |
| Width (ft, rectangular only) | 16 |
| Average depth (ft) | 5 |
- 32 × 16 × 5 = 2,560 cu ft.
- That is 19,150 US gallons or 72,491 liters; filling at 10 gal/min takes 31.9 hours.
Result:
| Volume (cu ft) | 2,560 |
|---|---|
| US gallons | 19,150 |
| Liters | 72,491 |
| Time to fill at 10 gal/min (hours) | 31.9 |
Frequently asked questions
How do I find average depth?
For a pool with shallow and deep ends, average them: (shallow + deep) ÷ 2. Sloped bottoms are an approximation.
Why does volume matter?
Pool chemicals are dosed per gallon, so an accurate volume avoids over- or under-treating the water.
Sources and further reading
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This calculator gives estimates for information only. Check important results independently before you rely on them. See our disclaimer.