rectangle pool, 24 ft x 12 ft x 4.5 ft average depth
- Cubic feet
- 1296
- Shape factor
- 1
- Gallons per cubic foot
- 7.48052
Sloped bottoms, steps, benches, freeform curves, and actual water line can change real pool volume.
Pool Volume Calculator
Use this free pool volume calculator to estimate U.S. gallons for rectangular, round, or oval pools from simple measurements.
Research-backed assumptions Formula steps Examples included Private in-browser use
Formula steps
- Find surface area from the selected shape.
- Multiply by average depth for cubic feet.
- Multiply cubic feet by 7.48052 to estimate U.S. gallons.
How to use the pool volume calculator
- Choose rectangle, round, or oval pool shape.
- Enter length, width or diameter, and average depth in feet.
- Press Calculate pool volume to estimate cubic feet and U.S. gallons.
- Use average depth and remember steps, benches, curves, and waterline height affect real volume.
Common uses
Estimate gallons before adding pool chemicals.
Compare rectangular, round, and oval pool volume.
Use average depth for shallow and deep ends.
Plan fill volume or rough equipment context.
Examples
Gallons estimate
Circular pool gallons
Oval volume estimate
Frequently asked questions
Plain-language answers about when to use the tool, what it does with your inputs, what to double-check, and how privacy works.
When should I use the Pool Volume Calculator?
Use it when your task matches one of these common needs: Estimate gallons before adding pool chemicals. Compare rectangular, round, and oval pool volume. It works best when you already know the values, dates, units, or settings the page asks for.
What is the Pool Volume Calculator doing with my inputs?
In plain language: The calculator estimates pool cubic feet from the selected shape and average depth, then multiplies cubic feet by 7.48052 gallons per cubic foot. The examples on the page are there so you can compare your inputs with a filled-out calculation before copying the answer.
What should I double-check before trusting the answer?
Sloped bottoms, steps, benches, freeform shapes, rounded corners, waterline height, and measurement error can change real pool volume. Also check that you used the right unit, date, scale, or mode because small input changes can change the result.
Does the site save what I enter?
No. The calculator runs in your browser tab. Your recent answers stay only on the page while you use it, and they are not sent to a server.