A Pool Chemical Calculator That Is Actually Free

Plenty of pool calculators say free and then hit you with a 7-day trial, a premium tier, or ads between every screen. Pool Clarity has none of that. Every feature is free, permanently, for every user.

What free includes

Exact chemical dosing for all six core parameters. Unlimited saved readings with full history. Chemistry trend charts. Weekly test reminders on your schedule. A maintenance calendar built for your pool type and climate. A service report card that grades your pool company. A cost tracker that shows what DIY saves you.

There is no locked tier, so there is nothing to compare. That list is the whole app, and it costs nothing.

How it stays free

When Pool Clarity recommends a chemical, it includes an optional Amazon link to a matching product. Buy through the link and Amazon pays us a small commission. Your price does not change, and you can ignore the links entirely and use the app forever.

This model keeps the incentives honest. The app only earns when its advice is useful enough that you act on it.

How the calculator works

Set up your pool once: shape, dimensions or volume, sanitizer type, environment, and state. Then each time you test, enter whichever readings your kit measures. The app flags what is out of range and produces a treatment plan with exact amounts, the correct order, and wait times between chemicals.

Want to see the kind of math it does? Try the free web calculators for muriatic acid and stabilizer right on this site.

Get the free calculator

No credit card. No trial countdown. Just the app.