numr is a text calculator for natural language expressions with a vim-style TUI.
This is free and open source software.
Key Features
- Natural language expressions: 20% of 150, $100 in euros, 2 hours + 30 min.
- Variables: tax = 15% then 100 + tax.
- Unit conversions: Length, weight, time, temperature, data sizes.
- Compound units: 5 m * 10 m = 50 m², 100 km / 2 h = 50 km/h.
- Currency conversions: USD, EUR, GBP, JPY, CHF, CNY, CAD, AUD, INR, KRW, RUB, ILS, PLN, UAH + crypto (BTC, ETH, SOL, and more).
- Live exchange rates: Fetched automatically on startup.
- Vim-style editing: Normal and Insert modes with familiar keybindings.
- Mouse support: Scroll with mouse wheel or trackpad.
- File persistence: Auto-saves to config directory, supports custom files.
- Syntax highlighting: Numbers, operators, variables, units, and currencies.
- Comments: Lines starting with # or // are treated as comments.
- Continuation: Start a line with an operator (+ 10, * 2) to continue from the previous result.
- Wrap mode: Toggle text wrapping with bottom-aligned results.
- Grouped totals: Currencies and units summed separately in footer (respects exchange rates).
Website: github.com/nasedkinpv/numr
Support:
Developer: Ben Nasedkin
License: MIT License
numr is written in Rust. Learn Rust with our recommended free books and free tutorials.
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