Daisy is a pretty, general-purpose TUI scientific calculator with support for units, derivatives, and more.
This is free and open source software.
Key Features
- Carefully designed and easy-to-read prompt.
- Evaluate expressions:
- Basic math:
103 / 2 * 43. - Functions:
sqrt(1.4^3 + 4) * sin(pi / 4). - Scientific notation:
1.2e12 * 1e-5.
- Basic math:
- Supports exponential notation.
- Supports many physical units, with metric and binary prefixes.
- Unit operations:
2 day + 1 hour. - Unit conversion:
2 day + 1 hour to minutes. - Compound units:
10 m/s to mph. - Conversion errors:
1 liter to volt.
- Unit operations:
- Supports variables:
- Previous answer:
ans + 2 - Variable assignment:
a = 143
- Previous answer:
- Clear syntax, parsed input is always re-printed as a sanity check.
- Useful, detailed error messages.
Website: git.betalupi.com/Mark/daisy
Support:
Developer: Mark
License: GNU General Public License v3.0

Daisy is written in Rust. Learn Rust with our recommended free books and free tutorials
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Read our verdict in the software roundup.
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