A portable expression calculator available as a Rust library, command-line tool, and MCP server.
Publisher’s description
What is excalc?
excalc by Vestris is open-source Windows software in the science & maths category.
Installation and requirements
The publisher provides MSI installers for 64-bit Windows. Installation asks for administrator rights. A silent install is possible with the installer’s documented switches. An MSI package is available for deployment with Group Policy, Intune or Configuration Manager.
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- MSI package for managed deployment
- Documented silent install
- Updated in the last two months
Cons
- No native ARM64 build
- Installation needs administrator rights
In short: excalc is an open-source science & math tool for 64-bit PCs. Administrators can deploy it unattended.
Is excalc safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
61D8E7538EADA6D1A4FA1B65C23F27EABD4588471D0EAD6A9FBB9A5BD79B47DD· Open the VirusTotal report for this hash - The link has not been checked yet
- 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 |
|---|---|---|---|
| 0.3.0Latest | September 26, 2026 | — | 64-bit MSI |
Install from the command line
Silent install ›winget install --id Vestris.Excalc -emsiexec /i excalc-0.3.0-x86_64.msi /qn /norestartmsiexec /x {8C782CBD-6964-46D5-A60E-5C17E5CCC4F7} /qn /norestartProgram files (.exe): calc.exe, excalc.exe, excalc-mcp.exe
Related guide: How to use winget: install and update apps
Information
- Publisher
- Vestris
- Category
- Science & maths
- Licence
- MIT
- Price
- Free
- Requires
- Windows 11 / 10
- Architecture
- 64-bit
- Installer
- MSI
- Version
- 0.3.0
- Released
- September 26, 2026
- Added to the catalogue
- November 4, 2026
- Versions listed
- 1
- Downloads on ExeAtlas
- 1
- Website
- github.com
- winget ID
- Vestris.Excalc
- MSI product code
- {8C782CBD-6964-46D5-A60E-5C17E5CCC4F7}
Ratings and reviews
No reviews yet. Be the first to rate it.
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Frequently asked questions
Is excalc free?
Yes. excalc is open-source software under the MIT licence.
Is excalc safe to download?
The download comes from github.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.
How do I install excalc with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can excalc be installed silently?
Yes. The silent install page lists the exact command for each installer, including msiexec for the MSI package.
Does excalc run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit version through emulation.
What are alternatives to excalc?
Stellarium, KiCad, Quarto, Qalculate! and JASP. The alternatives page compares them.
