# IHehsCalc — Calculator for E.H.S.

> EHS and industrial hygiene calculator for environmental, health, and safety professionals. (iPhone/iPad app by A-EHS.)

- Source: https://appshunter.io/ios/app/ihehscalc/id6446093566 (this page in markdown: same URL + `.md`)
- Developer: [A-EHS](https://appshunter.io/developer/1114522351)
- Category: Productivity, Education
- Price: Free
- Rating: 5.00/5 from 7 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 68 MB
- Languages: Dutch, English, French, German, Italian, Japanese, Korean, Portuguese, Chinese, Spanish and 1 more
- Released: 2023-03-10
- Data updated: 2026-06-07
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ihehscalc/id6446093566/reviews.md

## What is IHehsCalc?

This is a calculator for some of the equations found in the environment, health and safety (EHS) and industrial hygiene profession. There was originally an IHcalc app, aka IHcalc Lite. This was the product of some very smart students at Arizona State University. This is a new creation as an homage to that original app. This is version 1.0 of IHehsCALC, and I hope you will find it useful. The app is free, but we really, really, really, REALLY would like to see some folks make a donation to the American Industrial Hygiene Foundation. Also any corrections or suggestions please let us know via the help URL.

## Key features

- EHS calculations
- Industrial hygiene formulas
- Homage to original IHcalc app
- Free to use
- Donation option

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/ihehscalc/id6446093566/reviews.md

### 5/5 — Helpful tool

*2026-02-09*

Super helpful even for studying

### 5/5 — What an app

*2023-03-15*

If your profession has anything to do with health, safety, environment, or the like, this app will be world changing for you. 11/10 recommend this.

## Frequently asked questions about IHehsCalc

### What is IHehsCalc?

IHehsCalc is a free calculator application designed for professionals in the environment, health, and safety (EHS) and industrial hygiene fields. It offers calculations relevant to these professions and is an homage to a previous popular app.

### Is IHehsCalc free to download and use?

Yes, IHehsCalc is completely free to download and use. There are no upfront costs or required purchases to access its features.

### Does IHehsCalc have ads?

No, IHehsCalc does not contain advertisements. The app is free to use and does not display any ads to its users.

### What devices does IHehsCalc support?

IHehsCalc is available for iPhone and iPad devices. It is designed to run on Apple's iOS platform.

### How often is IHehsCalc updated?

The latest version of IHehsCalc is 1.1, which was last updated on April 20, 2023. The initial release was on March 10, 2023, indicating relatively frequent updates.

### What is the age rating for IHehsCalc?

IHehsCalc has an age rating of 4+. This means it is suitable for users of all ages, with no content restrictions.

### Can I suggest improvements or report issues with IHehsCalc?

Yes, the developers encourage users to provide corrections or suggestions. You can submit feedback via the help URL provided within the app.

### Is there a way to support the development of IHehsCalc?

While the app is free, the developers strongly encourage donations to the American Industrial Hygiene Foundation. This is a way to support the foundation and the continued development of useful tools for the EHS community.

## Version history (last 2 releases)

### 1.1 — 2023-04-20

Fixed some spelling errors, Pressure Conversions added, changed OSHA & EPA to “Safety & Environment” as the equations apply worldwide, several new equations including TLV of a mixture, and emissions post-controls (capture & control efficiency).

### 1.0 — 2023-03-11

No release notes.

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## More apps by A-EHS

- [RCRAmain](https://appshunter.io/ios/app/rcramain/id6447644115)
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All apps by A-EHS: https://appshunter.io/developer/1114522351

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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 2026-06-07.*