Pool & Spa

Pool and spa calculators for pool volume, chemical dosing, heater sizing, pump sizing, salt systems, and operating costs.

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Calculate pool water volume in gallons for rectangular, round, and oval pools based on dimensions and depth.

Calculate the amount of acid, chlorine, and baking soda needed to adjust pool pH, chlorine, and alkalinity levels.

Size a pool heater based on pool volume, temperature rise, surface area, and wind exposure using BTU calculations.

Size a pool pump based on turnover rate, pipe friction loss, and total dynamic head with energy cost estimates.

Calculate the salt needed to reach target levels and determine the correct salt chlorinator cell size for your pool.

Estimate the total cost of building a concrete, fiberglass, or vinyl liner pool including excavation, shell, equipment, and decking.

Calculate monthly and annual hot tub operating costs based on heating loss, pump usage, and electricity rates.

Use the bucket test method to determine if your pool is leaking and calculate the leak rate in gallons per day.

Calculate the chemicals and supplies needed to winterize your pool including shock, algaecide, antifreeze, and cover sizing.

Calculate pump size, pipe diameter, and flow rate for waterfalls, fountains, and sheer descent water features.

Chemical doses for hot tub from volume and test results.

Monthly electricity or wood fuel cost from sauna type and use.