Pool Volume Calculator
Gallons in a pool, plus chlorine dosing.
Enter your values
ⓘ Live results
Results
- Volume
- 21,065 US gallons
- In litres
- 79,740 L
- Average depth
- 5.5 ft
- Surface area
- 512 sq ft
- Liquid chlorine for 1 ppm
- 22.5 fl oz
Quick answer
Rectangular pool gallons equal length × width × average depth in feet × 7.48.
Gallons = L × W × avg depth × 7.48
How to use the Pool Volume Calculator
- 1Pick the pool shape.
- 2Enter the dimensions in feet.
- 3Enter shallow and deep end depths.
Worked example
Using the values the calculator loads with:
Inputs
- ShapeRectangular
- Length or diameter32 ft
- Width16 ft
- Shallow end depth3 ft
- Deep end depth8 ft
Results
- Volume21,065 US gallons
- In litres79,740 L
- Average depth5.5 ft
- Surface area512 sq ft
- Liquid chlorine for 1 ppm22.5 fl oz
Frequently asked questions
Why does volume matter?
Every chemical dose — chlorine, acid, stabiliser — is prescribed per 10,000 gallons, so an accurate volume prevents over-dosing.
How much chlorine for a shock?
Shocking usually targets 10 ppm free chlorine, so roughly ten times the 1 ppm dose shown above.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.