Libre Calculator

Libre Calculator is a free, MIT-licensed calculator app for Windows and Linux, with a web version at librecalculator.com. Calculations include worked steps, formulas and visual explanations.

Use it for percentages, exact fractions, geometry, unit conversions, compound interest, loan payments and tip splitting. The desktop app includes a quick calculator panel with a configurable global keyboard shortcut, search and optional calculator packs.

Source code, issue tracking and canonical releases: https://github.com/tonyzedginidze/librecalculator

Maintained by Tony Zedginidze. Project contact: tony@boringdystopia.ai. This SourceForge project provides a download mirror of official releases.

Features

Worked calculation steps, formulas and visual explanations, with a desktop quick panel and configurable keyboard shortcut

Project Samples

Percentage calculator with worked steps and a visual explanation.

$Exact fraction arithmetic with worked steps and a diagram.$

Fraction guide explaining the formula and variables.

Mortgage calculator with explicit assumptions and payment breakdown.

Project Activity

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License

MIT License

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Libre Calculator Web Site

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Additional Project Details

Operating Systems

Linux, Windows

Intended Audience

End Users/Desktop

Registered

2026-11-01

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