Open Source Windows Calculator AlternativesTop Calculators and other similar apps like Windows Calculator

The best open source alternative to Windows Calculator is SpeedCrunch. If that doesn't suit you, our users have ranked more than 100 alternatives to Windows Calculator and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Windows Calculator are Qalculate!, OpenCalc, GeoGebra Scientific Calculator and Numara 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
     
    |
    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!

     103 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).

    115 Qalculate! alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    Main window
     
  4. OpenCalc icon

    OpenCalc

     21 likes

    A simple and beautiful calculator for Android.

    Cost / License

    Application type

    Platforms

    • Android
    • Android Tablet
    • F-Droid
    OpenCalc screenshot 1
     
    |
    1
    OpenCalc vs Windows Calculator Comments
    Marcus Holloway
    Negative
    0

    This runs on Android, not Windows. Therefore, it is not a viable option for Windows Calculator.

    • OpenCalc is Free and Open SourceWindows Calculator is also Free and Open Source
    • OpenCalc is Privacy focusedWindows Calculator is not according to our users
  5. GeoGebra Scientific Calculator icon

    GeoGebra Scientific Calculator

     9 likes

    Free online scientific calculator from GeoGebra: perform calculations with fractions, statistics and exponential functions, logarithms, trigonometry and much more!

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    GeoGebra Scientific Calculator screenshot 1
     
  6. Numara Calculator icon

    Numara Calculator

     8 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
     
  7. Numbat icon

    Numbat

     23 likes

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

    75 Numbat alternatives

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Self-Hosted
    Numbat screenshot 1
     
  9. Calculator You icon

    Calculator You

     5 likes

    Discover the ultimate calculator experience with our beautifully designed app, featuring 60+ stunning color themes to match your style. Whether you're tackling complex scientific equations or simple everyday calculations, our powerful and user-friendly interface makes it all...

    Cost / License

    Application type

    Platforms

    • Android
    • F-Droid
    Calculator You screenshot 1
     
  10. GNOME Calculator icon

    GNOME Calculator

     12 likes

    Calculator is an application that solves mathematical equations and is suitable as a default application in a GNOME Desktop environment.

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Linux
    • Linux Mobile
    • Flathub
    • GNOME
    • Flatpak
    Basic Mode
     
    |
    1
    GNOME Calculator vs Windows Calculator Comments
    Guest
    Positive
    -1

    It is well-maintained by many contributors.

    Review by a new / low-activity user.
    • GNOME Calculator is Free and Open SourceWindows Calculator is also Free and Open Source
  11. Uno Calculator icon

    Uno Calculator

     6 likes

    Open-source calculator app with Windows Calculator features including standard, scientific, and programmer modes, plus unit and currency conversions. Available for macOS, Linux, Android, iOS, and web, with an intuitive interface for both desktop and mobile devices.

    Cost / License

    • Free
    • Open Source (MIT)

    Application type

    Platforms

    • Mac
    • Linux
    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Flathub
    Uno Calculator screenshot 1
     
  14. NumberHub icon

    NumberHub

     4 likes

    Calculator, converter and so much more!.

    Cost / License

    Application type

    Platforms

    • Android
    NumberHub screenshot 1
     
12 of 47 Windows Calculator alternatives