kalkki

Modern scientific calculator in the browser inspired by SpeedCrunch

Demo

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Kalkki is a modern web-based scientific calculator designed as an replacement for SpeedCrunch. I started developing this because the Finnish matriculation exams are moving from a Linux based environment to a restricted browser one meaning SpeedCrunch wouldn't be available.

Features

• Familiar terminal style
• Experimental LaTeX pasting support
• Support for user defined variables and functions
• Vast selection of built-in functions
• History (up and down arrow)
• Progressive Web App for offline usage
• Super fast math evaluation powered by GMP and WASM
• Tokenizer based math parser (forked from Abicus)

Usage

You can do these with your favorite package manager. I like Bun, but it isn't required to run this.

1. bun install
2. bun run dev

Tada! You have a dev server running on :5173. Consult package.json 'scripts' for more information.

The project uses Biome for linting and code formatting. Make sure to bun run check your code before submitting a PR. We use husky for pre-commit checks.

TODO

• Autocorrect / suggestions
• Unit conversion
• Make the LaTeX support more stable
• Check the AI-generated Swedish translation
• Add bouncing(?) and some sort of job queue -> same expression (for suggestion and calc) could wait for the original one

License

Licensed under the AGPLv3 license, consult LICENSE for more information.

Credits

• Logo icon: Tabler Icons math-function-x, licensed under MIT, see license.
• Abicus for the math engine, licensed under MIT, see license or src/math/LICENSE