Calculators Hub

Get a chlorine dose and pH adjustment guidance 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.

Find out whether to raise or lower your hot tub's pH and by how much (small, moderate, or substantial adjustment)—plus safe, incremental dosing guidance.

Hot tub shock calculator. Enter spa gallons, target ppm, and shock product for a product-specific dose. 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.

Find out whether to raise or lower your pool's pH and by how much (small, moderate, or substantial adjustment)—plus safe, incremental dosing guidance.

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