Open Source Windows Calculator Alternatives for Windows

There are many alternatives to Windows Calculator for Windows if you are looking for a replacement. The best open source Windows alternative is SpeedCrunch. If that doesn't suit you, our users have ranked more than 100 alternatives to Windows Calculator and 18 are open source and available for Windows so hopefully you can find a suitable replacement. Other interesting open source Windows alternatives to Windows Calculator are Qalculate!, Numara Calculator, Numbat and Precise Calculator.

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Alternatives list

  1. SpeedCrunch icon

    SpeedCrunch

     291 likes

    SpeedCrunch is a free, fast, high precision open source algebraic calculator with an intuitive interface and many features, such as variables, syntax highlighting, functions, persistent input history & more.

    130 SpeedCrunch alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Mac
    • Windows
    • Linux
    • PortableApps.com
    Dark Mode
     
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    5
    SpeedCrunch vs Windows Calculator Comments
    Top Positive Comment
    nickkiousis
    1

    It is clean, design can be configured, it does it's job as a calculator, it can be set to be always on top of other applications, it keeps history even after closing it. It is the best calculator I have ever used!

    Review by a new / low-activity user.
    Guest
    Positive
    1

    Clean and lots of keybinds for speed.

    Review by a new / low-activity user.
    Guest
    Positive
    1

    It's a terminal based calculator. Features a good interface for inputting slightly longer calculations. Allows editing the input text if you make errors. Offline available, free, pleasing to the eye and customizable.

    Review by a new / low-activity user.
    3 of 5 comments
    • SpeedCrunch is Free and Open SourceWindows Calculator is also Free and Open Source
    • SpeedCrunch is Privacy focusedWindows Calculator is not according to our users
  2. Qalculate! icon

    Qalculate!

     104 likes

    Qalculate! is a multi-purpose cross-platform desktop calculator. It is simple to use but provides power and versatility normally reserved for complicated math packages, as well as useful tools for everyday needs (such as currency conversion and percent calculation).

    116 Qalculate! alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    Main window
     
  4. Numara Calculator icon

    Numara Calculator

     9 likes

    A simple but powerful notepad calculator which evaluates expressions as you type.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    Numara Light Theme
     
  5. Numbat icon

    Numbat

     23 likes

    High precision scientific calculator with full support for physical units (web and terminal versions).

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Self-Hosted
    Numbat screenshot 1
     
  6. Precise Calculator icon

    Precise Calculator

     6 likes

    Programmable scientific calculator which has more than 150 mathematical functions and all of them return as many digits as you need. It can calculate with real numbers, complex numbers, fractions, vectors, matrices. Commands if, goto and print can be used to create scripts.

    Cost / License

    Application type

    Platforms

    • Windows
    Precise Calculator screenshot 1
     
  7. GraphCalc icon

    GraphCalc

     17 likes

    GraphCalc is an all-in-one solution to everything from everyday arithmetic to statistical analysis, from betas to Booleans, from cubes to calculus, from decimals to derivatives. GraphCalc combines all the features of a professional mathematics package with the simplicity of an...

    Cost / License

    • Free
    • Open Source

    Application type

    Alerts

    • Discontinued

    Platforms

    • Windows
    • Linux
    Main UI
     
  9. Giac/Xcas icon

    Giac/Xcas

     9 likes

    Giac/Xcas is a free computer algebra system for Windows, Mac OS X and Linux/Unix (license GPL3, for commercial dual-license contact us).

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    Giac/Xcas screenshot 1
     
  10. TTCalc icon

    TTCalc

     7 likes

    TTCalc is an open source bignum mathematical calculator. It features arithmetical functions, trigonometric functions, inverse trigonometric functions, hyperbolic functions, inverse hyperbolic functions, logical operators, logarithms, functions for converting between degrees and...

    72 TTCalc alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Windows
    Standard tab
     
  11. EBTCalc icon

    EBTCalc

     1 like

    EBTCalc is a Reverse Polish Notation (RPN) calculator that can have custom buttons. Custom buttons are programmed in Javascript with a convenient editor. EBTCalc runs on Windows 10, OSX, and Linux as well as Android. EBTCalc is open source.

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Android
    EBTCalc screenshot 1
     
  12. ImaginaryInfinity Calculator icon

    ImaginaryInfinity Calculator

     1 like

    ImaginaryInfinity Calculator is an expandable calculator. It's command line interface is designed to resemble that of some graphing calculators. New functionality can easily be added by installing user created plugins.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • BSD
    • Python
    • Haiku
    The calculator on startup on Linux
     
  13. kalker icon

    kalker

     4 likes

    A calculator with syntax highlighting that supports user-defined variables and functions, math-like syntax, and some more advanced operations such as derivation and integration (estimate), and complex numbers.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Android
    • Self-Hosted
    kalker screenshot 1
     
  14. Caligator icon

    Caligator

     3 likes

    A kickass, open-source calculator that lets you do calculations and unit conversions naturally, with features like:

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Alerts

    • Discontinued

    Platforms

    • Mac
    • Windows
    • Linux
    Caligator screenshot 1
     
12 of 18 Windows Calculator alternatives