Pool Calculators
Free pool care calculators: chlorine dosing, pH and alkalinity adjustment, pool volume, pump sizing, salt levels, and heater BTU calculations.
Pool Heater BTU Sizing Calculator
Calculate BTU/hr heater needed to raise pool temperature by N degrees in a given time. Adjusts for indoor vs outdoor heat loss.
Pool Pump Turnover Time Calculator
Calculate how long your pool pump needs to run for one full water turnover and find the right daily runtime for your pump's GPM rating.
Saltwater Pool Salt Calculator
How many pounds of pool salt to add to reach target salinity for chlorinator cells. Adjusts by pool volume, current ppm, and target ppm.
Pool Cyanuric Acid (CYA / Stabilizer) Calculator
How much cyanuric acid stabilizer to add to bring pool CYA into the 30-50 ppm range (or 60-80 for saltwater chlorinator pools).
Pool Total Alkalinity Calculator (TA Adjustment)
Sodium bicarbonate dose to raise TA, or muriatic acid dose to lower TA, into the 80-120 ppm safe range for stable pool pH.
Pool pH Adjustment Calculator (Acid / Base)
Muriatic acid, dry acid, or soda ash dose to bring pool pH to the 7.4-7.6 sweet spot. Adjusted by total alkalinity for accuracy.
Pool Shock Treatment Calculator
Calculate cal-hypo or liquid chlorine dose for breakpoint chlorination and standard pool shock. Reaches FC = 10 × CC for full oxidation.
Pool Chlorine Dosage Calculator (FC Raise)
How much liquid chlorine, cal-hypo, dichlor, or trichlor to raise free chlorine by N ppm. Calibrated for common pool product strengths.
Pool Volume Calculator (Round / Oval)
Find gallons in a round or oval swimming pool from diameter or major and minor axes. Includes constant-slope sloped-bottom adjustment.
Pool Volume Calculator (Rectangular)
Calculate gallons in a rectangular swimming pool with sloped or flat bottom. Enter length, width, and depths to get the exact volume for chemistry math.