Free tool

Pool chlorine dosage calculator

Find your exact weekly tablet dose in seconds. Works for any stabilized (balanced) pool.

How it works

The simple rule for 3" chlorine tablets

For a stabilized pool (balanced alkalinity and stabilizer), use roughly 1 tablet per 5,000 gallons per week — most residential pools need 1–2 tablets. Place them in your skimmer basket, floater, or automatic feeder and let them dissolve slowly.

Important: tablets maintain blue, crystal-clear water — they do not fix a green pool. If your water is green, shock it first, rebalance, then return to weekly tablets.