# Engineering Unit Converter > Streamlined unit, currency, and calculation converter for engineers and general users. (iPhone/iPad app by Vector 254 LLC.) - Source: https://appshunter.io/ios/app/engineering-unit-converter/id468517228 (this page in markdown: same URL + `.md`) - Developer: [Vector 254 LLC](https://appshunter.io/developer/821141755) - Category: Reference, Productivity - Price: Free with in-app purchases - Rating: 4.30/5 from 85 App Store ratings · 34 written reviews indexed - Age rating: +4 - Requires: iOS 11.2 · 6 MB - Languages: American English - Released: 2011-10-05 - Data updated: 2026-08-29 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/engineering-unit-converter/id468517228/reviews.md ## What is Engineering Unit Converter? A streamlined, powerful, user-friendly unit and currency converter designed for use by everyone and built by engineering professionals! No dials to turn, no gimmicky interfaces, no need to type your unit... just enter a value in the unit you have and see the conversion for the one you want as well as others all at once. All laid out in big, easy to read text with an intelligent, customizable display system. There is also a versatile Currency converter included in the app! The app also includes a powerful built-in Calculator and a spreadsheet-style Mass Fraction/Mole Fraction Converter. Also included are a very useful Thermocouple module and a database of physical constants. Conversions aren't limited to just one pair of units. There are 40+ different types of units currently in the app. Set your preferred units or most frequently used units for quick access to the data most needed. Don't want to see all of the units in a given category? You can reorder and hide units based on your needs. The app is designed to accept mathematical expressions as your input! For example, if you need to convert 1 3/8 inches to mm, just enter 1+3/8 in the inches cell... and you can do far more complex operations as well! Detailed math help is available under Settings+. As another bonus, we have provided a control panel that can be used to tailor the colors of the app to the user's preferences. You'll find this feature under Settings+. While you're there, check out the links to our other apps and find us on social media! Like us on Facebook: www.facebook.com/ChemEApp Follow us on Twitter: @Vector254 ## Key features - Unit conversion - Currency conversion - Built-in calculator - Mass/Mole Fraction Converter - Physical constants database - Customizable display - Mathematical expression input ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Unlock App | $0.99 | one-time | ## Recent user reviews (10 of 34) All indexed reviews: https://appshunter.io/ios/app/engineering-unit-converter/id468517228/reviews.md ### 5/5 — Great app *2024-06-14, version 3.0* Thank you developer :) Great app to have if constantly want to convert from one unit or currency to another. ### 4/5 — Good app, but… *2022-03-09* Still need to fix the long ton error. ### 4/5 — Excellent. Long ton error *2020-09-30* Love this so far. Noticed a decimal error in long ton conversion. ### 1/5 — Won’t Open on New iPad *2020-07-22* Works great on my iPad Pro v. 13.5.1, but won’t open on iPad Air v. 13.6. ### 5/5 — Converter *2018-12-08* This is a great free app that I constantly use. I use this app for working on my car doing volume conversions, torque conversions, and also for random daily use. This is a must have app for anyone who is a do it yourselfer. ### 1/5 — App stopped working. Immediately close when entering data *2017-12-11* Immediately close when entering data ### 4/5 — Useful *2017-09-01, version 2.8* Great ### 5/5 — Awsome!!!! *2017-01-28* Love it! ### 5/5 — Fast and easy to use *2017-01-22* Works great and very easy to use ### 5/5 — Highly Optimized *2016-11-16* Lots of cool features in addition to a whole bunch of unit converter modules! The only unit converter app worth using. ## Frequently asked questions about Engineering Unit Converter ### What does the Engineering Unit Converter app do? This app provides a powerful and user-friendly platform for converting various units of measurement and currencies. It also includes a built-in calculator, a mass/mole fraction converter, a thermocouple module, and a database of physical constants, making it a comprehensive tool for engineering and scientific tasks. ### What are the key features of this unit converter? Key features include a streamlined interface for instant conversions, support for over 40 unit types, a versatile currency converter, the ability to input mathematical expressions for complex calculations, and a customizable display system. It also offers a built-in calculator and a database of physical constants. ### Is this app free to use? The app is free to download and use, offering a range of functionalities without initial cost. However, it does have in-app purchases, suggesting that some advanced features or content might be available for an additional fee. ### What kind of conversions can I perform with this app? You can perform a wide array of conversions, including over 40 different types of units such as length, mass, volume, temperature, and more. It also features a dedicated currency converter and can handle complex mathematical expressions within its conversion inputs. ### Who is the target audience for the Engineering Unit Converter? The app is designed for a broad audience, including engineering professionals, students, and anyone who frequently needs to perform unit and currency conversions. Its user-friendly interface and powerful features also make it suitable for general users requiring accurate calculations. ## Version history (last 5 releases) ### 3.0 — 2017-12-20 This app has been updated by Apple to display the Apple Watch app icon. Unlocked the app special features for all users as a Christmas present. Fixed a bug that would crash the app when entering units. Disabled the currency converter until we find a new data stream. Fixed an error in the conversion factor for g/L in density. ### 2.8 — 2016-11-04 We've been working on new ways of using unit conversions in complex ways. We've added a 'Gas Constant Converter' to the Premium Units. Those who have already purchased the 'Unlock App' in-app purchase will receive this for free. Three new unit categories have been added, including: 'Velocity (Angular)', 'Fuel Efficiency (Volume)' and 'Diffusivity'. Fixed issues where some very large or small conversions would yield zero values. Thanks to @Calvincookieman. Made the code more lightweight. Follow @Vector254 on Twitter! ### 2.7.1 — 2015-11-20 Added a few units to specific enthalpy and specific entropy. Added two definitions for standard cubic feet values in moles and flowrate (molar) categories. Thanks to one of our users for suggesting this! Other minor bug fixes and enhancements. ### 2.7 — 2015-11-05 We've done a bit of housekeeping to streamline navigation through the app! Switching between the calculator, currency converter and premium modules is now much easier and faster through a toolbar added to the main interface. Selecting/adding/removing currencies in the currency module is now much more efficient. We've also added conversions for Bitcoin, gold, silver, platinum and palladium. We've also rearranged some features from the prior release. The NIST menu is going away (for now) and we've made Thermocouples and Constants into their own separate modules, which are now only available to users who have purchased the "Unlock App" in-app purchase. The Math Help menu has been moved to the calculator. As always, we've made other bug fixes and minor enhancements. ### 2.6 — 2015-10-01 We've added modules that utilize NIST standard reference data to the app! These include a really cool thermocouple calculator, values and symbols for over 300 physical constants and information on elements and compounds. For a limited time, these features will be available to all users After the next update, these new features will only be available to those who have purchased the "Unlock App" in-app purchase. We'll continue to add information like this moving forward as we make Engineering Unit Converter & Calculator a go-to source for science & engineering information and calculations! Other bug fixes and minor enhancements. ## Apps similar to Engineering Unit Converter | App | Rating | Price | Category | | --- | --- | --- | --- | | [Unit Converter - Pro Units App](https://appshunter.io/ios/app/unit-converter-pro-units-app/id1139120257) | 4.6 (16,123) | Free | Reference | | [Steel Profiles](https://appshunter.io/ios/app/steel-profiles/id564614324) | 4.7 (269) | Free | Reference | ## More apps by Vector 254 LLC - [Chemical Engineering AppSuite HD](https://appshunter.io/ios/app/chemical-engineering-appsuite-hd/id526158171) - [CEE Grad Guide 2023-24](https://appshunter.io/ios/app/cee-grad-guide-2023-24/id1048394040) All apps by Vector 254 LLC: https://appshunter.io/developer/821141755 ## Related topics [computer science converter](https://appshunter.io/ios/topics/computer-science-converter) · [hgv height converter](https://appshunter.io/ios/topics/hgv-height-converter) · [units converter for engineers](https://appshunter.io/ios/topics/units-converter-for-engineers) · [viscosity conversion](https://appshunter.io/ios/topics/viscosity-conversion) --- *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 2026-08-29.*