# Pool Chemical Dose Calculator

> Pool chemical dosage calculator for various pool sizes and chemical adjustments. (iPhone/iPad app by Hasa Inc..)

- Source: https://appshunter.io/ios/app/pool-chemical-dose-calculator/id1148385163 (this page in markdown: same URL + `.md`)
- Developer: [Hasa Inc.](https://appshunter.io/developer/1713193810)
- Category: Productivity, Utilities
- Price: $5.99
- Rating: 2.90/5 from 13 App Store ratings · 8 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 1 MB
- Languages: American English
- Released: 2016-09-11
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/pool-chemical-dose-calculator/id1148385163/reviews.md

## What is Pool Chemical Dose Calculator?

Pool Chem Dose Calculator will calculate the exact chemical dose needed for 38 chemicals in 11 categories for any size pool in US Imperial or Metric measures. To use it you enter the pool volume in gallons or liters, choose US Imperial or Metric, select which item you want to change from the drop down list and then enter the desired change in ppm or mg/l. Pool Chem Dose Calculator then lists all of the chemicals that can be used for that item change and the doses for each one. It only shows 3 chemicals on the screen. If there are more than 3 for an item, you can scroll down the list.

No brand names, no sales just the exact dose of the chemical you want to use by chemical name. Use it while you are at a pool or in the field to find out how much chemical to add to make a correction or increase or decrease a condition.

Select from the following items: 

Increase Chlorine, 15 chemicals Increase Bromine 2 chemicals
Increase Alkalinity 3 chemicals Decrease Alkalinity 2 chemicals
Increase Hardness 2 chemicals Increase CYA 2 chemicals
Increase Oxidizer 1 chemical Decrease Chlorine 6 chemicals
Increase Salt 1 chemical Increase Borate 3 chemicals
Increase Copper 1 chemical.

For example, if you want to Increase Chlorine by 3 ppm in a 14,750 gallon pool, enter 14750, select US Imperial, select Increase Chlorine from the drop down menu and enter 3.0 in ppm. Instantly see the amounts needed to get 3.0 ppm chlorine in that pool for 15 types of chlorine. Makes it easy to compare and see which might be cheaper to use or make a substitution. 

You can also use the Pool Chem Dose Calculator to figure out the change to a water condition if you add an amount of chemical. For instance suppose you have a 15,000 gallon pool and you want to know how much the free chlorine will increase if you add a gallon of 10% liquid chlorine. No problem, just enter the pool volume, select US Imperial, select Increase Chlorine and then enter an amount for ppm. Keep changing the ppm up or down until the dose amount for Chlorine 10% gets near 128 fl oz or 4 qts.

Saves money because you get the exact dose for that pool – no more guessing. Have an emergency where too much chlorine was added and now you need to neutralize the chlorine in the pool? No problem, Just enter the pool volume, US or Metric, select Decrease Chlorine and enter the amount of chlorine you want neutralized and you get the amounts needed for 6 chlorine neutralizers. You will find this app invaluable.

## Key features

- Calculates doses for 38 chemicals
- Supports 11 chemical categories
- US Imperial and Metric measurements
- Input pool volume in gallons or liters
- Adjust chemical levels by ppm or mg/l
- Compares different chemical options

## Chart rankings

- #189 in Top Paid · Productivity (US App Store)

## Recent user reviews (8 of 8)

All indexed reviews: https://appshunter.io/ios/app/pool-chemical-dose-calculator/id1148385163/reviews.md

### 1/5 — App crashes No support

*2023-05-23*

This app was great and a very valuable tool. But for nearly two years there has been no update for iOS so it doesn’t work. 
Please get it back up and running then it will easily be a 5 star app.

### 4/5 — Not updated since 2017

*2023-01-18*

Lowery, I use your app everyday. Love the simplicity of it. Professional since 1999. But if I update my phone to ios16 I know it will not work after that. Please update I don’t like all the other apps there too complicated. I would be happy to pay for it or subscribe.

### 5/5 — Some how when I select the item the app closes and i keep trying and still closing

*2022-10-24*

Thanks it used to work fine pleas help

### 5/5 — All you need

*2022-04-06*

This app is all you need for acid dosing your pool or spa. Disregard the other negative reviews. The creator of this app is Bob Lowry and his team. Bob has been in the water chemistry and chemical business almost 50 years. He wrote the books and gave the knowledge the modern and old school pool service techs used and use still today. Extensive research has gone into making this app. You will need to know basic water chemistry. If you want an app for all other chemicals. Download the other app “pool chem dose calculator.” I service pools and I highly recommend using these apps.

### 5/5 — Fantastic buy

*2020-10-23*

Great app if using borates for adjusting alk!

### 2/5 — No options for pH change

*2017-10-23*

No options for calculations to decrease or increase pH. Huge downfall of this app, in my opinion.

### 1/5 — Just a calculator

*2017-06-04*

App provides no recommendations or shift from current levels.  Must have specific knowledge of what differential level you wish to achieve. 

Does not provide any logging or graphing of existing levels for ongoing maintenance. Way too much money for a basic calculator.

### 1/5 — Useless

*2016-11-07*

Doesn't ask for your current level.

## Frequently asked questions about Pool Chemical Dose Calculator

### What is the price of Pool Chemical Dose Calculator?

Pool Chemical Dose Calculator is a paid app priced at $5.99. This one-time purchase grants you access to all its features without further costs.

### Does Pool Chemical Dose Calculator have ads?

No, Pool Chemical Dose Calculator is ad-free. You can use the app without any interruptions from advertisements.

### What devices is Pool Chemical Dose Calculator available on?

Pool Chemical Dose Calculator is available on iPhone, iPad, and iPod. It is designed for iOS devices.

### How often is Pool Chemical Dose Calculator updated?

The latest version of Pool Chemical Dose Calculator is 1.6, which was last updated on August 14, 2017. Updates are not frequent, with the last one being several years ago.

### What is the age rating for Pool Chemical Dose Calculator?

Pool Chemical Dose Calculator has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.

### What do users think of Pool Chemical Dose Calculator?

User sentiment for Pool Chemical Dose Calculator appears mixed, with an average rating of 2.8 stars from 12 ratings. This suggests some users find it useful while others may have experienced issues or have suggestions for improvement.

### Can Pool Chemical Dose Calculator calculate chemical changes from adding a specific amount of product?

Yes, Pool Chemical Dose Calculator can determine the resulting change in water condition if you add a specific amount of a chemical. You can input the pool volume and the amount of chemical added to see the effect on parameters like free chlorine.

## Version history (last 2 releases)

### 1.6 — 2017-08-14

This update from Apple will improve the functionality of this app. No new features are included.

Improvements

### 1.0 — 2016-09-08

No release notes.

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## More apps by Hasa Inc.

- [Pool Acid Dose Calc](https://appshunter.io/ios/app/pool-acid-dose-calc/id711282054)
- [Orenda](https://appshunter.io/ios/app/orenda/id1171005221)
- [pH-Alkalinity Adjustment Tool](https://appshunter.io/ios/app/ph-alkalinity-adjustment-tool/id1527031215)
- [HASA water](https://appshunter.io/ios/app/hasa-water/id6473078202)
- [Hasa Pro Rewards](https://appshunter.io/ios/app/hasa-pro-rewards/id6751251252)

All apps by Hasa Inc.: https://appshunter.io/developer/1713193810

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*