RedCrab, Free Scientific Calculator Download

Martin Brinkmann
Nov 1, 2010
Updated • Mar 1, 2011
Software, Windows, Windows software

We all know that Windows comes with a free calculator. Microsoft has even redesigned the calculator from scratch for their latest operating system Windows 7. The improved calculator offers the four modes standard, scientific, programmer and statistics now. All have in common that the calculator is fine for some basic equations, but less so for complex equations.

That's where other scientific calculators come in. Red Crab is a free and portable calculator for Windows that is perfectly suitable for complex algebraic equations like fractions, square roots, exponents and a lot more. The best option to take a look at the calculator's capabilities is to load a few of the demo projects that ship with the download.

free scientific calculator

Probably the biggest difference to Windows Calculator is the ability to add characters and symbols everywhere, just like it is possible on normal paper. This provides enough room to add complex equations and functions on the page. Multiple functions and equations can be added to the same page, with the possibility to use results for further calculations.

The scientific calculator opens two windows on startup. The main window with basic controls and the text area for the equations, and an extra window with functions and symbols. This extra window can be docked to the main window by clicking on View > Panel Undocked.

scientific calculator download

There is a lot to explore, and the best place to start is the extensive user manual. The contents include information on how to write mathematical expressions, use the tools to change font sizes or superscript, use the function and symbol panel, keyboard shortcuts and basic information on how to work with the scientific calculator.

The developer has created a few tutorial videos to demonstrate some of the calculator's functionality.

Users who are interested in the scientific calculator RedCrab can download the program from the developer homepage.


Tutorials & Tips

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  1. Mani said on July 29, 2011 at 1:05 pm


    its mani. I need Scintific Calculator Software for free download.
    can u help me.



  2. Ernie said on May 26, 2011 at 5:55 pm

    Web-based calculators are more convenient than carrying around a clumsy electronic calculator.

  3. LogicDaemon said on November 14, 2010 at 3:43 pm

    SMath Studio is also free and open source, but can also draw graphs, including 3D, and there are also PocketPC (=WM Pro and Classic) and Smartphone (= WM standard edition) editions!

    1. LogicDaemon said on November 14, 2010 at 3:55 pm

      sorry, I mistaken, it’s not open source :(

  4. kalmly said on November 2, 2010 at 3:52 pm

    RE my previously posted comment. This app makes no claim to being a scientific calculator. Sorry, I should have paid more attention.

  5. kalmly said on November 2, 2010 at 3:51 pm

    This works for me: I think it can be found on CNET too, at least the phone version.

    Make comments, run virtual tapes, make templates, etc., etc. Versions for PCs and phones.

  6. worksheets for kids said on November 2, 2010 at 1:42 am

    Thank you..
    I never though that with calculator we can calculate such operation
    very useful for student

    1. Lol said on February 26, 2012 at 12:07 pm

      Get off the dope mate and phrase your sentences comprehensibly.

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