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Free42 Download For Windows is a complete rewrite of the HP-42S Scientific Calculator and the HP-82240b Printer. It does not require an image of the printer. It is fully compatible with both the original and rewritten calculators.

It is a free to use calculator that’s styled after the popular HP-42S calculators. It features a built-in list of features that allow users to perform more advanced calculations.

Due to the increasing number of people working in various industries, the demand for specialised software has become more prevalent. Free42 is one of the most popular utilities that enables people to perform complex maths expressions easily.


Free42 is a product of Thomas Okken and it was released in January 2022. You can find other apps similar to Free42 on the Android Market. Its latest version was 3.0.10 and it is available for free download.

This project is an open-source version of the RPN calculator, which means it does not require a ROM to run. It can run smoothly even though it uses a written-from-scratch simulator.

If you are using an Android device and are in the market to install Free42, then you have come to the right place. We have listed down the best Android Emulator that will allow you to install Free42 on your PC.

Features of Free42 Download

Re-implementing the existing Windows code

Wine is a way to run Windows programs on Linux without requiring Windows. It does so by re-implementing the existing Windows code so that it can run all the Windows apps without requiring Windows.

 Replicating all of the functions of the device

This utility is based on the RPN scientific hand held calculator from the HP-42S. It does a good job of replicating all of the functions of the device. Its implementation skin also looks pretty similar to the one in the HP-42S.

Binary and decimal mode

This utility is very similar to the design and features of the original HP-42S calculators. Most of the basic functions are also present in this app, making it possible to use it anywhere. It also has a binary and decimal mode, which are very helpful for advanced calculations.

New functions and changed the name

This version added a number of new functions and changed the name of its component to PGMVAR. It also fixed an issue that caused the incorrect printing output in TRACE and NORM modes.

Very useful for most purposes

Although there is no manual for Free42, the original owner’s manual for the HP-42S is very useful for most purposes. If you’re not sure which one to use, I also recommend getting the Alternative Manual written by Russ Jones and José Lauro Strapasson.

How to Download Free42 for Windows PC Free

  1. Click the Download button at the top of the Page.
  2. Wait for 10 Seconds And Click the “Download Now” button.
  3. Now let the Start to Download
  4. Once Free42 is done downloading, Double click the setup files and you can start the installation.

How to Install Free42 on your Windows PC

  1. First, you need to Download Free42 Software for your Windows Computer.
  2. Once you Download the Application, Double click the setup files and start the Installation process.
  3. Now follow the All Installation Instruction.
  4. Once the installation is completed, restart your computer. (It is Better)
  5. Now open the Application from the home screen.

How To Uninstall Free42

  1. Go to the Control Panel on Your Windows PC.
  2. Open the Programs and Features
  3. Find the Free42, Right-click the Select icon, and press “Uninstall”. Confirm the action.
  4. Now you need to Delete the App Data. Go to the Windows Run Application. (Shortcut – Windows Key + R). Now Type in ‘%AppData%’ and press ‘OK’.
  5. Now find the Application folder and delete it.

Free42 Alternative For Windows

  • Quantum GIS
  • FreeCAD
  • REScheck 
  • DraftSight 
  • SimplexNumerica 
  • Atmel Studio


Free42 Download for Windows is developed and updated by Thomas Okken. All registered trademarks, company names, product names, and logos are the property of their respective owners.

Version History

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