Pool Volume Calculator

Water volume in gallons and liters for rectangular, round, or oval pools.

Calculator Construction Updated Apr 19, 2026

Shape

Length (ft) Width (ft)

Diameter (ft)

Long (ft) Short (ft)

Avg depth (ft)

Conversions

1 ft³

= 7.4805 US gallons

1 gallon

= 3.785 L

Avg depth

(shallow + deep) / 2 for sloped bottom

Last updated: April 19, 2026