RedCrab Calculator
Math Software with Fullscreen Editor and Free Formula Placement
Overview
RedCrab Calculator is a mathematics software with an innovative fullscreen editor. The software enables the free placement of algebraic formulas on the worksheet in natural mathematical notation.
- Natural mathematical notation for formulas
- Free placement of formulas on the worksheet
- More than 250 mathematical functions
- Results can be displayed in different numeric formats and in diagrams
- Images and texts can be inserted for documentation
- RedCrab worksheets are also suitable for presentations
RedcrabX — A Fresh Start
RedcrabX is not an update to RedCrab Calculator 8.x — it is a completely new application built from the ground up. Features that were rarely used have been intentionally removed to keep the interface clean and focused.
In their place, a brand-new interface has been designed for a smoother workflow, and the range of mathematical functions has been significantly expanded — with particular emphasis on domain-specific areas such as electrical engineering, geometry, and physics. This expansion is ongoing, with more functions being added continuously.
If you are looking for the classic RedCrab 8.x and its features, documentation and resources for the older version remain available online.
Go to Redcrab XRedCrab version 8.x
RedCrab Features
RedCrab Calculator offers an extensive set of features for mathematical calculations and documentation.
Fullscreen Editor
User-friendly editor with natural mathematical notation for complex formulas
Free Placement
Formulas can be freely positioned on the worksheet – not limited to cells
Visualization
Results can be displayed as numbers, tables or diagrams
Documentation
Integration of images and texts for complete documentation of calculations
Presentation
Worksheets with natural notation are also suitable for presentations
250+ Functions
Extensive mathematical function library for all important operations
Portability & System Requirements
Portable and Installation-Free
The RedCrab Calculator is portable and can be copied and started without installation. It also runs from external storage devices (e.g. USB flash drive). Program settings are stored in the start directory.
System Requirements
Version 8.x (current)
- Microsoft .NET Framework 4.0 or higher
- Microsoft Windows XP, Vista, W7, W8.x, W10, W11
Older Versions
RedCrab version 4.13 and older also run on Linux with the Wine runtime system.
Download version 4.13RedCrab Online – Platform Independent
In addition to the desktop version, RedCrab also offers an online solution that is completely platform independent.
The new RedCrab online calculator provides a fullscreen editor and function plotter. No installation required – ready to use immediately in any modern web browser.
Advantages of the Online Version
- Platform independent – works on Windows, Mac and Linux
- No download or installation required
- The most important mathematical functions included
- Lightweight version with continuous improvements
- Additional functions added based on demand and feedback
Online Manual & Help
Comprehensive documentation and help for using the RedCrab Calculator.
User Manual
The RedCrab Calculator User's Guide can be found here. It contains detailed descriptions for handling the program and documents more than 250 mathematical functions.
The online help for the individual functions can also be called up directly from the program with a mouse click or with the F1 key.
License & Availability
Freeware
RedCrab Calculator is Freeware and free to use
Download
Simple download without hidden costs
Online Version
Additional online version for browser-based use
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