Free42, an HP-42S Calculator Simulator
Publisher’s description
What is free42?
free42 is an open-source science & math program for Windows.
Installation and requirements
Official installers exist for 64-bit and 32-bit as Portable. The main installer is 4.6 MB. It runs without installation (portable).
Popularity and file types
The Chocolatey package has been downloaded 4,367 times. Similar programs include Stellarium, KiCad and Quarto.
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Portable: runs without installation
- Small download (4.6 MB)
Cons
- No native ARM64 build
In short: free42 is an open-source science & math tool for 64-bit and 32-bit PCs.
Is free42 safe to download?
- The file is served by thomasokken.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
919D2021E6499F1B99592003F201F037FC1A38E206065DBD5102C390D8E94607· Open the VirusTotal report for this hash - The link answered when we last checked it (October 26, 2026)
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 1 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 3.4Latest | 4.8 MB | 64-bit ZIP32-bit ZIP |
Install from the command line
Silent install ›choco install free42 -yscoop install extras/free42Program files (.exe): free42binary.exe, free42decimal.exe
Related guide: How to use winget: install and update apps
Information
- Category
- Science & maths
- Licence
- GPL-2.0-only
- Price
- Free
- Source code
- github.com
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, 32-bit
- Installer
- Portable
- Version
- 3.4
- Versions listed
- 1
- Chocolatey downloads
- 4,367
- Website
- thomasokken.com
- Chocolatey package
- free42
- Scoop package
- extras/free42
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is free42 free?
Yes. free42 is open-source software under the GPL-2.0-only licence.
Is free42 safe to download?
The download comes from thomasokken.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
Does free42 run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit and 32-bit version through emulation.
Can I use free42 without administrator rights?
Yes, it is portable: unpack and run it.
What are alternatives to free42?
Stellarium, KiCad, Quarto, Qalculate! and JASP. The alternatives page compares them.
