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Free tools

Calculators that show their math.

Each one runs the same chemistry engine as the app, works without an account, and explains every number. Save the pool when you're done and it's there next time.

  1. 1How long should I run my pool pump?How many hours to run your pump, at which speed, and what it costs a day at your electricity rate, adjusted for hot weather.Pool pump run-time and energy planner
  2. 2How much chlorine should I add to my pool?Your free chlorine target from your CYA, and exactly how much liquid chlorine, cal-hypo, dichlor or trichlor to add, with side effects.Chlorine calculator
  3. 3How many gallons is my pool?Gallons, litres and cubic metres for rectangular, round, oval and kidney pools, with sloped floors handled properly.Pool volume calculator

Chemistry doses are checked against our reference cases on every release. More tools are added as they're finished.