✦ SOLVORY FREE ONLINE TOOLS · HOME & DIY
Pool Volume Calculator — Free Online Tool
Estimate swimming-pool water capacity for rectangular, round and oval pools using dimensions, shallow and deep depths and percentage filled.
How to use the Pool Volume Calculator
Estimate swimming-pool water capacity for rectangular, round and oval pools using dimensions, shallow and deep depths and percentage filled.
- Choose the pool shape and enter dimensions using feet or meters.
- Enter measured shallow and deep water depths, not exterior wall heights.
- Adjust filled percentage for partial fills.
- Compare liters, cubic meters, US gallons and Imperial gallons.
Accuracy note: Geometric estimate excluding steps, benches, rounded corners and complex bottoms.
Pool Volume Calculator formula and method
Volume = plan area × average depth × filled percentage. Rectangular area = length × width; circular area = πr²; elliptical area = π × half-length × half-width. 1 cubic meter = approximately 264.172 US gallons.
All numeric results depend on entered measurements, dimensions and settings. Intermediate calculations retain decimal precision; displayed results may be rounded. Verify material specifications, relevant laws and seller fee conditions where applicable.
Worked example
A rectangular 10 ft × 10 ft pool at uniform 4 ft depth holds 400 cubic feet, or approximately 2,992 US gallons.
Adjust the values in the interactive tool above to reproduce this example or model your own situation.
Frequently asked questions
Are US and UK pool gallons equal?
No. One US gallon is 3.785411784 liters; an Imperial gallon is 4.54609 liters.
How do I calculate a pool with sloped depth?
Use the average of the shallow and deep depths for roughly linear slopes. Complex bottom shapes need a segmented calculation.
Can this calculate chemical doses?
It estimates geometric water capacity only. Always use product-specific testing and chemical guidance.