Calculators Hub

Calculate exact chlorine, pH, and alkalinity doses in seconds—enter gallons + test readings. Avoid over-treatment, cut guesswork, and keep water swim-ready.

Hit 3–5 ppm sanitizer in seconds: enter spa gallons + test strip readings for exact chlorine ounces. Avoid over-chlorination, rash risk, and cover damage.

Hot tub pH calculator. Enter spa gallons and current pH to get pH increaser or reducer amount. Free and fast.

Hot tub shock calculator. Enter spa gallons and shock type to get shock dosage. Free and fast.

Pool alkalinity calculator. Enter pool gallons and current alkalinity to get alkalinity increaser amount. Free and fast.

Pool chlorine calculator: gallons + ppm in → exact liquid or granular ounces out. For pH, alkalinity, and combined dosing, use the main Pool Chemical Calcula...

Pool cyanuric acid (CYA) calculator. Enter pool gallons and current CYA to get stabilizer amount. Free and fast.

Turn pH + gallon readings into exact increaser or reducer ounces in 30 seconds. Fewer wild swings, safer water for skin, liner, and chlorine performance.

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