SpeedCrunch

SpeedCrunch is a free, open-source scientific calculator designed for fast, accurate mathematical computations using a keyboard-focused interface. It evaluates expressions as users type and displays results in a scrollable calculation history. Its high-precision engine supports advanced arithmetic, scientific functions, and mathematical constants. Syntax highlighting makes complex expressions easier to read and edit. Automatic completion helps users quickly enter built-in functions, constants, and previously defined variables. A formula book provides access to useful mathematical expressions across scientific disciplines. Users can define custom variables and functions for repeated calculations. Developed with Qt, SpeedCrunch runs on Windows, macOS, and Linux and supports multiple interface languages.