Pool-Calculator
House & Home · Pool and Spa Resources
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Looking for help with calculations for your swimming pool or hot tub chemistry? The Pool Calculator does all the math for you, making testing and treating your pool or hot tub a breeze.
Pool Calculator tells you exactly how much of each chemical to add to keep your water in balance and crystal clear. No more puzzling over complicated charts and formulas.
Bring your Android phone or tablet out to the pool and have all the chemical information and calculations you need right at your fingertips.
Pool Calculator provides a complete tool kit to make pool care easy. You get: • Chemical Calculators • Volume Calculator • Effects (What-if) Calculator
CHEMICAL CALCULATORS You can use whichever test strip or test kit you prefer for testing your pool or hot tub. Pool Calculator provides calculations for: - Chlorine (FCl) - Raising pH - Lowering pH - Total alkalinity (TA) - Calcium hardness (CH) - Stabilizer (CYA or cyanuric acid) - Salt - Borate (Borax) - Calcium saturation index (CSI, similar to LSI)
RECOMMENDED CHEMICAL RANGES With Pool Calculator, the recommended ranges for your chemicals are based upon whether you have a pool or hot tub, and the surface material (plaster, vinyl or fiberglass) of your pool or hot tub. You can choose from several pre-defined ranges or customize based on your preferences.
POOL VOLUME CALCULATOR To keep your swimming pool or hot tub at its best, it’s important that you accurately calculate your water volume. All of the chemical balancing recommendations you receive from the Pool Calculator are based on it. You can calculate the volume of your pool in metric units (liters) or in imperial units (gallons). The Pool Volume Calculator can be used for: • Rectangular Pools and Hot Tubs • Oval Pools and Hot Tubs • Round Pools Hot Tubs
CHEMICAL EFFECTS CALCULATOR “What if” analysis for adding chemicals to your pool or hot tub! Ever want to know the impact of adding a given amount of Chemical has on your swimming pool or hot tub chemistry?
The Effects Calculator calculates the impact adding a specific amount of chemical has on your pool chemistry. It does this not only for the primary purpose of the chemical, but also on the other important measurements for your pool. For example, adding Trichlor not only raises your Free Chlorine, it also increases your Cyanuric Acid, lowers your pH and increases your Salt. Adding Cal Hypo raises Free Chlorine, and also raises Calcium Hardness (CH) and Salt.
With the Effects Calculator you can measure the effects on pool chemistry of adding a given dose of: • Bleach • Trichlor • Dichlor • Cal-hypo • Lithium Hypochlorite • Chlorine gas • Muriatic Acid • Dry Acid • Washing soda • Soda Ash • Borax • Sodium Tetraborate Pentahydrate • Boric Acid • Caustic Acid (lye) • Baking Soda • Calcium Chloride • Calcium Chloride dihydrate • Stabilizer • Liquid Stabilizer • Salt
What's new in version 6.0.1
Fixed a bug related to setting a pool's volume
App specs
- Version6.0.1
- UpdatedOctober 2, 2025
- Downloads10K+
- RequiresAndroid 7.0+
- PriceFree
- Age ratingEveryone
Pool-Calculator: frequently asked questions
Is Pool-Calculator free?
Yes. Pool-Calculator is free to download from Google Play.
Who makes Pool-Calculator?
Pool-Calculator is developed by Pool and Spa Resources and was first released on June 28, 2014.
Which Android version does Pool-Calculator need?
Pool-Calculator needs Android 7.0 or later.
Where can I download Pool-Calculator safely?
Install it from the official Google Play listing. eFreeware does not host app files; our download page links straight to Google Play.
Download Pool-Calculator
by Pool and Spa Resources
Free · Official store listings