Free Pool & Hot Tub Calculators

Calculate chemical dosages, equipment sizing, water volume, and operating costs Calculate chemical dosages, water volume, and pool costs — all for free. No signup, no guesswork.

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Pool Maintenance

Chemical dosage calculators, water balance tools, pH and alkalinity adjusters for crystal-clear pool water.

10 calculators

Pool Design & Equipment

Pool cost estimators, sizing guides, pump and filter calculators, heater sizing, and deck area planners.

8 calculators

Hot Tub & Spa

Hot tub cost calculators, chemical dosing, energy costs, cover sizing, and maintenance schedules.

7 calculators

Pool Operations

Operating cost estimators, evaporation calculators, pump runtime, solar heating, winterization, and resurfacing tools.

10 calculators

Popular Calculators

Pool Chemical Calculator

Calculate the right amount of chemicals to add to your pool based on its volume and current water test results.

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Pool Volume Calculator

Calculate the exact volume of your swimming pool in gallons based on its shape and dimensions.

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Chlorine Dosage Calculator

Calculate the exact amount of chlorine to add to your pool based on your current and desired free chlorine levels.

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Pool Cost Estimator

Estimate the total cost to install an inground or above-ground swimming pool based on size, material, and features.

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Pool Leak Detection Calculator

Determine if your pool is leaking by comparing water loss to normal evaporation rates based on temperature and conditions.

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Above-Ground Pool Setup Calculator

Calculate the volume, liner size, water weight, and foundation requirements for setting up an above-ground pool.

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Seasonal Pool Maintenance Schedule

Get a customized pool maintenance schedule with chemical check frequency, filter runtime, and opening/closing dates based on your pool type and climate.

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Hot Tub Cost Calculator

Estimate the total cost of buying, installing, and operating a hot tub based on size, type, and features.

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Hot Tub Chemical Calculator

Calculate precise chemical dosages for your hot tub based on its volume and current water test results.

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Hot Tub Energy Cost Calculator

Estimate monthly and yearly electricity costs for running your hot tub based on usage, climate, and efficiency.

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