Pool Volume Calculator (Gallons)

Pool volume formulas

Rectangle: length × width × average depth × 7.48. Round: 3.14 × radius² × depth × 7.48. Oval: 3.14 × (length ÷ 2) × (width ÷ 2) × depth × 7.48. The factor 7.48 is the number of US gallons in one cubic foot.

Average depth

For a pool with a sloped floor, add the shallow and deep end depths and divide by 2. A pool 3.5 ft to 8 ft deep has an average depth of 5.75 ft. Measure to the water line, not the top of the wall.

How many gallons is a 16x32 pool?

A 16 × 32 ft pool with an average depth of 5.5 ft holds about 21,065 US gallons.

How many gallons is a 24 ft round pool?

A 24 ft round pool with 4 ft of water holds about 13,536 gallons.

How many gallons are in a cubic foot?

7.48 US gallons.