Pool-Calculator is a house & home app developed by Pool and Spa Resources.
Download Statistics
Pool-Calculator has been downloaded 10 thousand times. In the last 30 days, the app was downloaded 740 times. It is ranked #194 in house & home.
User Ratings
Pool-Calculator is rated 4.41 out of 5 stars. The rating is based on 210 ratings.
App Information
Pool-Calculator is FREE to download. The APK download size is 71.26 MB. The latest version available is 6.0.1. The last update was on October 2, 2025.
Technical Requirements
Pool-Calculator requires Android 4.4+ or higher. The app has a content rating of Everyone. The app has been available on Google Play June 2014.
Description
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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
Recent changes: Fixed a bug related to setting a pool's volume
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Pretty good. But there seems to be a bug in the calculation for the salt amount to be added, when using metric units. In the "Effects" calculation, the amount is correct. But in the "Test" calculation, the amount is too high by a factor of about 3.8. Pool volume defined e.g. as 10000 liters seems to be interpreted as 10000 gallons (instead of 2641.721 gallons).
★★★★★Heather Holly· May 30, 2022
Very helpful for keeping your pool ship shape!
★★★★★Venka D'Sachi· May 30, 2021
Have been using this since it came out, and I love it. I just noticed this year that you can keep track of multiple pools. This is great because I also test pool water for a couple of my friends' pools who have different sized pools and chemical choices.
★★★★☆Jacob Frantz· Jun 4, 2021
Simple app. Basic easy way to track your pool chemicals.
★☆☆☆☆Channon Palmer· Jun 2, 2021
I bought this hoping it would be helpful. It won't even let me create an account. I tried to adjust my pool size and the gallons, and it's reading wrong. My 14 by 48 size round pool only holds 3300 gals. It keeps adjusting it to 4000 which is wrong. The clorox app is free and does the same thing BTW. Sorry.
★★☆☆☆Craig· Apr 15, 2022
I purchased the app to support the developers a year or so ago. It's cumbersome. Have to hit the checkbox on the keyboard to save entries, which is non-intuitive. Doesn't appear to be a way to save tests, so I went back to check the online version, and now I guess there's a membership cost to actually save them. The data behind this app for on demand testing and balancing a pool/spa is very helpful, but the app design is certainly lacking and makes what should be very easy clumsy.
★☆☆☆☆Steven Korres· Aug 16, 2020
Incorrect values don't trust results. 2 online calculators and my pool shop all agreed that I need to add roughly 60 kg of salt but this app wants me to add over 200 kg of salt which would be a total disaster. I have a 40000 liter pool with a target salt level of 3000ppm, and I tested 1500ppm and this should result in around 60 to 70 kg of salt from memory not 225 kg. Very inaccurate. Please fix. Steve
★☆☆☆☆J Green· Nov 17, 2019
Bad app for DIYs just learning. I have a spa. The app suggests that my total alkalinity should be between 50 and 80, this is erroneous. In the Effects part of the app it says that washing soda/sodium carbonate decreases pH and alkalinity which is totally erroneous. I have emailed the makers of this app with no response. Kind of a waste for a couple dollars!
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