Pool calculators

Pool Volume Calculator

Gallons and liters from your pool shape and dimensions. The number every dose depends on.

Pool Chlorine Calculator

Exact chlorine to add for liquid, bleach, cal-hypo, or dichlor, with FC/CYA targets.

Pool Salt Calculator

How many pounds and bags of salt to reach your target for a saltwater pool.

Cyanuric Acid Calculator

How much stabilizer to add to bring CYA into range, in ounces and pounds.

Pool Alkalinity Calculator

Baking soda to raise total alkalinity, or muriatic acid to lower it.

Calcium Hardness Calculator

How much calcium chloride to bring hardness into range, dihydrate or anhydrous.

Pool pH Calculator

Muriatic acid to lower pH or soda ash to raise it, using the carbonate buffer model.

Pool Shock Calculator

The SLAM shock level for your CYA and the chlorine to reach it.

Saturation Index Calculator

Your LSI water balance: corrosive, balanced, or scaling, corrected for CYA.

Pump Size Calculator

The flow in GPM to turn your pool over, and your pump's run time.

Pool Heater Calculator

Heat-up time and BTU for a target temperature, with or without a cover.

Pool Running Cost Calculator

Monthly and yearly cost from pump electricity, chemicals, and heating.

Swimming Laps Calculator

Lengths and laps for a mile or any distance, in any pool size.

Hot Tub Volume Calculator

How many gallons your spa holds, accounting for seats and the fill line.

Hot Tub Chemical Calculator

Dichlor chlorine, sodium bromide to start bromine, and non-chlorine shock.