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 loads of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Windows Calculator are Qalculate!, OpenCalc, Calculator You and GeoGebra Scientific Calculator.

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Most Windows Calculator alternatives are Calculators, but you can also narrow the list to Graphing Calculators or Math Solvers. Other popular filters are Open Source and Windows. You can also filter for EU-based alternatives if you prefer software from the European Union.
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Alternatives
Windows Calculator alternatives page was last updated

Alternatives list

  1. SpeedCrunch icon

    SpeedCrunch

     294 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.

    128 SpeedCrunch alternatives

    Cost / License

    Application type

    Alerts

    • Discontinued

    Platforms

    • Mac
    • Windows
    • Linux
    • PortableApps.com
    • DE flagGermany
    • European Union flagEU
    Dark Mode
    Good alternative?
     
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    6
  2. Qalculate! icon

    Qalculate!

     108 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).

    118 Qalculate! alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • SE flagSweden
    • European Union flagEU
    Main window
    Good alternative?
     
  4. OpenCalc icon

    OpenCalc

     24 likes

    Lightweight Android calculator app offering basic and scientific calculation, customizable themes such as Dark, Light, Amoled, and Material You, history tracking, minimal permissions, portrait and landscape orientation, no internet required, and quick launch.

    Cost / License

    Application type

    Alerts

    • Discontinued

    Platforms

    • Android
    • Android Tablet
    • F-Droid
    • FR flagFrance
    • European Union flagEU
    OpenCalc screenshot 1
    OpenCalc screenshot 2
    OpenCalc screenshot 3
    Good alternative?
     
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    1
  5. Calculator You icon

    Calculator You

     7 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
    Good alternative?
     
  6. 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!

    135 GeoGebra Scientific Calculator alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Online
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • AT flagAustria
    • European Union flagEU
    GeoGebra Scientific Calculator screenshot 1
    Good alternative?
     
  8. Numara Calculator icon

    Numara Calculator

     10 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
    Good alternative?
     
  9. Numbat icon

    Numbat

     23 likes

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

    76 Numbat alternatives

    Cost / License

    Application type

    Platforms

    • Mac
    • Windows
    • Linux
    • Online
    • Self-Hosted
    • DE flagGermany
    • European Union flagEU
    Numbat screenshot 1
    Good alternative?
     
  10. GNOME Calculator icon

    GNOME Calculator

     13 likes

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

    74 GNOME Calculator alternatives

    Cost / License

    • Free
    • Open Source

    Application type

    Platforms

    • Linux
    • Linux Mobile
    • Flathub
    • GNOME
    • Flatpak
    • US flagUnited States
    Basic Mode
    Good alternative?
     
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    1
  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
    • CA flagCanada
    Uno Calculator screenshot 1
    Uno Calculator screenshot 2
    Uno Calculator screenshot 3
    Good alternative?
     
  14. NumberHub icon

    NumberHub

     5 likes

    Calculator, converter and so much more!.

    Cost / License

    Application type

    Platforms

    • Android
    • Global
    NumberHub screenshot 1
    NumberHub screenshot 2
    NumberHub screenshot 3
    Good alternative?
     
12 of 51 Windows Calculator alternatives