Numi

Numi is a text-based calculator and converter for macOS that combines natural language input with powerful calculation capabilities. Instead of entering rigid formulas, users can type expressions in plain English-like syntax and see results update instantly. Its primary purpose is to make everyday calculations, unit conversions, and quick notes more intuitive, readable, and reusable than traditional calculators or spreadsheets.

Numi supports a wide range of operations, including arithmetic, percentages, currency and unit conversions, date and time calculations, and variables. Users can define reusable variables and functions, reference previous lines, and organize multiple related calculations in a single document-like interface. The tool understands mixed expressions such as “20% of 45 EUR in USD” or “2 weeks from today,” automatically applying the correct conversions. It also includes support for custom units, themes, and integration with the macOS menu bar for quick access.