What it does
RedCrab Calculator places mathematical formulas freely on a worksheet and supports diagrams, text and images for documentation.
Classic RedCrab Calculator arranges formulas, text and images freely on a worksheet, with numerical, table and diagram outputs. The official page keeps version 8.3 resources distinct from RedcrabX, a rebuilt application that intentionally removes some older features. Classic RedCrab is freeware and portable, with settings stored in its start directory; the listed Windows family includes Windows 7 through 11. Linux with Wine is explicitly limited to version 4.13 and older. RedcrabX instead advertises a 30-day trial. Match the manual and desired worksheet features to the chosen generation.
Strengths
- Free placement of formulas in natural notation
- Text and images can document the working
Watch out for
- RedcrabX and older RedCrab versions have different feature sets
Best for
- Preparing a visual calculation worksheet
Sources
- RedCrab Calculator - Math Software with Fullscreen Editor (Oct 26, 2026)