Pool volume calculator

Work out gallons for rectangle, round, oval and kidney pools from length, width and depth in feet. Free, no sign-up, and it works on your phone at the pool.

How the math works

Average depth is shallow plus deep divided by two. Rectangle: length × width × average depth × 7.5. Round: diameter × diameter × average depth × 5.9. Oval: length × width × average depth × 5.9. Kidney: 0.45 × (width A + width B) × length × average depth × 7.5.

A good volume number makes every dose better. Keep it on the stop. Next: the chlorine dose calculator.