title = “One quart of 10% liquid chlorine raises a 10,000-gallon pool by about 1 ppm.” type = “.report.” source_topic = “Swimming Pools”

That’s the quick rule. For any pool, the math is simple: multiply your pool volume (in gallons) by the desired ppm raise, divide by 10,000, then divide by your chlorine strength (as a decimal) — but honestly, just remember the baseline.

If you have a 20,000-gallon pool and want to raise chlorine by 2 ppm, you need two quarts of 10% liquid chlorine. Simple scaling. Different strength? Adjust: 12.5% chlorine is about 25% stronger, so use 25% less volume.

The only hard part is knowing your pool volume. Measure length, width, average depth, and use a standard calculator (lots are free online). Once you have that number, the dosing is easy.

Don’t overthink it — just measure your pool volume first. Everything else is arithmetic.