Pool Volume & Chlorine Dose

Calculate swimming pool volume in litres and gallons and the chlorine needed to raise the level by a chosen ppm, free online.

Pool shape

Length / diameter (m)

Width (m)

Average depth (m)

Raise free chlorine by (ppm)

Chlorine strength (%)

About this calculator

Volume = area × average depth: rectangle L×W, round π(D/2)², oval 0.8927 × L × W. Liquid chlorine (12.5% sodium hypochlorite) needed to raise free chlorine by x ppm = x × pool gallons ÷ (10,000 × strength%) gallons. Keep free chlorine at 1–3 ppm and pH 7.2–7.6.