Pool Volume Calculator — Gallons in a Swimming Pool
The Pool Volume Calculator tells you how many gallons of water your pool holds — essential information for chemical dosing, pump sizing, heating costs, and water delivery. Enter your pool dimensions and shape for an accurate estimate.
How to Use This Calculator
- 1
Select your pool shape.
- 2
Enter the length and width (or just diameter for round pools).
- 3
Enter the average depth (add shallow and deep end, divide by 2).
- 4
Click Calculate for the total volume in US gallons.
Frequently Asked Questions
For a pool with a slope: (shallow end depth + deep end depth) / 2. For a flat-bottom pool, the average depth equals the actual depth.