About PoolFormula

PoolFormula started with a simple frustration: pool chemistry shouldn't require a science degree. We found ourselves squinting at product labels, second-guessing dosages, and searching through forums for straightforward answers that never came.

So we built the calculators we wished existed — free, accurate, and designed to give you a clear answer in seconds. No sign-ups, no paywalls, no ads cluttering the screen. Just type in your numbers and get the result.

What we offer

• Pool volume calculator for rectangle, oval, round, and kidney shapes
• Chemical dosage calculators for chlorine, shock, salt, CYA, alkalinity, pH, and calcium hardness
• Metric and imperial unit support
• Instant results with no account required

Our approach

Every formula we use is based on established pool chemistry standards. We keep things simple: enter what you know, get what you need. No unnecessary complexity, no upsells — just the numbers that help you keep your pool clean and balanced.

PoolFormula is and always will be free to use. If our calculators save you time or help you avoid a costly mistake, that's all the reward we need.