SpeedCrunch: A classy features-rich keyboard-driven calculator for scientists and enthusiasts

I have been never a fan of classical calculators user-interface, therefor I am always looking for and using command-line calculators.

SpeedCrunch is a lightweight calculator program without the traditional calculator buttons, It provides a simple powerful interface which make a use of the keyboard, mathematical terms and shortcuts and display results in interactive way as the user's type.

But many users my prefer old-school keyboard, so they can have an optional on-screen keypad from view menu. It's fairly easy-to-use and works seamlessly on Windows, macOS and Linux.

Despite its small size, SpeedCrunch is features-rich program with dozens of usable functions and options.

Variables functionality in SpeedCrunch allows users to store their results which comes handy for many specific users.

Key Features

  1. Reactive results
  2. Keyboard driven
  3. Easy-to-use
  4. Multi-platform: Windows, Linux and macOS
  5. History support
  6. Session manager
  7. Advanced settings manager
  8. Customizable syntax highlighting
  9. 80+ built-in mathematical functions
  10. Variables support
  11. Complex numbers support
  12. Built-in unit conversions
  13. Auto-completion
  14. Built-in formulas book and 150+ scientific formulas.
  15. Multi-languages support
  16. Statistical functions
  17. Session manager with import/ export functions
  18. Full-screen mode
  19. Supports many languages

Languages supported

SpeedCrunch supports many languages as it's packed by a strong community of users and developers, it supports English  Chinese (China, Taiwan), German, Italian, French, Polish, Portuguese, Romanian, Russian, Chzech, Spanish, Dutch, and more.

Install SpeedCrunch

SpeedCrunch offers Windows, Linux and macOS generic software packages which ease install process.

Linux's users can find SpeedCrunch in their software repository for Ubuntu, Debian, Fedora, Arch Linux, Manjaro and openSUSE.  They can also download 32-bit (RPM, Deb and Generic package) as well as 64-bit.

For Windows systems, SpeedCrunch offers an installer package and a portable package that works without install in one single file.


The project is a free open-source software which is released under GNU General Public License.


Contribution is open for developers and users to report bugs or request new features, and translate the program into new languages.

If you are interested in supporting this great project, SpeedCrunch offers many ways to donate you can find them here.


  1. http://speedcrunch.org/
  2. http://speedcrunch.org/reference/index.html
  3. https://bitbucket.org/heldercorreia/speedcrunch
  4. https://www.transifex.com/heldercorreia/speedcrunch/
  5. Photo by Roman Koval from Pexels

Padloc, The Open-source Password manager for teams and enterprises that works everywhere

What is Padloc?Padloc is a dead-simple password manager app for users who want to get the job done without any distractions and clutter. Padloc is a free, open-source solution but also offers a web service that helps the user to sync and st.......Read more...

QtPass is a free, open-source multiplatform Password manager

What is QtPass?QtPass is an open-source, free password manager GUI for the standard Unix password manager "pass" application. The "pass" password manager is a command-line open-source feature-rich application that follows Unix's philosophy........Read more...

Buttercup: a simple user-friendly Password manager for all platforms

What is Buttercup?Buttercup is a lightweight password manager for desktop and mobile. It comes with a strong 256bit AES encrypted vault that keeps your passwords and credentials secure and safe. Buttercup is a completely free, open-source.......Read more...

AuthPass is a KeePass compatible free Password manager for Windows, macOS, and Linux

What is AuthPass?AuthPass is a multi-platform, free, and open-source password manager for all types of users. AuthPass is fully compatible with the popular open-source KeePass password manager, which many consider the father of open-source.......Read more...

Spectator is an open-source REST-API testing app for Linux

What is Spectator?Spectator is a free, open-source (Libre) REST-API testing program for Linux. It is written in Vala programming language and GTK. The app allows developers to make requests to test their web endpoints, create custom environ.......Read more...