About PoolCalc

PoolCalc exists to make pool care simple. Most pool problems come down to math that gets explained badly: how much water you have, and how much of each chemical to add. The calculators here give you the number and show how it was worked out, so you can treat the water with confidence.

What you will find here

Free calculators for pool volume, salt, and chemical dosing, plus honest buyer guides for cleaners, pumps, heaters, and test kits. The calculators are the core. The guides are there for when a calculator points you toward buying something.

Independence

PoolCalc is independent and not affiliated with any pool brand. Some links earn a commission when you buy through them, which keeps the calculators free. A commission never changes a recommendation, and the reasoning is always shown so you can judge it yourself.

Start here

Open the calculators, beginning with pool volume.