Pool Chemistry Calculator

Pool Chemistry Calculator is a pool chemical calculator and pool calculator for the moment after a water test. Type the readings from your kit, choose your pool or hot tub volume, and see the next practical step in units you can use: fl oz, lb, gallons, mL, litres, g or kg. The app covers free chlorine, combined chlorine, pH, total alkalinity, calcium hardness, CYA, salt, bromine and temperature. It keeps a pool water test log, shows charts, and includes a volume calculator for rectangle, round, oval and kidney pools. Hot tub chemicals are sized for small volumes too. Chlorine calculator targets follow the CYA level you enter. pH doses use total alkalinity and CYA instead of a one-size rule. Large doses are split into steps with a reminder to run the pump and retest before adding more. The free tier includes one pool, test entry, editable targets, chlorine and pH doses, and 30 days of log. Pro adds unlimited pools and spas, the full product library, saturation index, full history and charts, reminders, visit-report PDFs and backup restore. Pro is available as a yearly plan with a 7-day trial or one lifetime purchase. No account or sign-in is required. Your pools, readings, notes and service details stay on your device. Export all my data and Delete all data are available in Settings. Always follow the product label and safety instructions. Never mix chemicals. Add chemicals to water, not water to chemicals. These are calculations, not professional advice. For personal record-keeping. Not an official document.

First release. Type water-test readings and see chlorine, pH and balance doses for pools and hot tubs. Includes editable targets, test log, charts, volume calculator, export and delete data. Pro adds unlimited pools, full product library, saturation index, reminders, visit reports and backup restore.