ClearPool — Pool Calculator

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Pool chemistry calculator that tells you exactly how much chlorine, acid or salt to add. Track every water test, watch your pool's chemistry trend over time, and know what to do when the water turns green. Built for the home pool owner who is tired of guessing at the pool store.

POOL CHEMISTRY CALCULATOR
Enter your current readings - free chlorine, pH, total alkalinity, calcium hardness, cyanuric acid, salt - and ClearPool calculates the exact amount of chemical to add. Liquid bleach, cal-hypo, dichlor, trichlor, muriatic acid, soda ash, baking soda, calcium chloride, stabilizer, pool salt - every common dosing chemical, in fluid ounces, cups, pounds or grams.

WATER TEST LOG
Log every water test with one tap. Date, time, all eight parameters, plus a notes field. ClearPool flags readings outside the safe range so you spot trouble before it shows up in the water.

TREND CHARTS
See your pool's chemistry over the last 7, 30 or 90 days. Watch pH drift, chlorine consumption, alkalinity stability. Tap any point on the chart to jump to that test entry. Premium unlocks the full history view.

GREEN POOL GUIDE
When the water turns green, panic turns to a checklist. ClearPool's green pool guide gives you the shock dose for your pool volume, the order of operations, and the safety warnings - all in one screen.

QUICK DOSE FOR DAILY MAINTENANCE
Most days you only need to adjust chlorine and pH. The Quick Dose shortcut skips the full calculator - two readings in, two doses out.

HOT TUB MODE
Hot tubs and spas have different ideal ranges for sanitizer and alkalinity. Set the pool type to hot tub and ClearPool adjusts every range and target accordingly.

MULTI-POOL SUPPORT
Track your main pool, the kids' pool and the hot tub independently. Each one keeps its own volume, history and trends.

CHEMICAL REFERENCE
Ideal ranges, dosing charts, compatibility warnings (never mix chlorine and acid), saltwater pool guidance, troubleshooting cards. The reference you would otherwise be Googling at midnight.

PREMIUM - $4.99 ONE-TIME PURCHASE
Unlock unlimited pool profiles, unlimited test history, full trend charts, and remove all ads. One payment, lifetime access. No subscription.

PRIVACY
Your pool data stays on your device. Backup to share a JSON file with yourself if you want to move devices. No accounts, no cloud, no tracking.

ClearPool is for pool owners who want clear water and clear answers - without paying a pool store to read a test strip. Verify chemical amounts with a second source before adding; ClearPool is for estimation.

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