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Qalculate!Numi
Free

Free and open source under the GPL.

 Freemium

Free to download, with a paid license offered on the website.

Windows, macOS, Linux Windows, macOS, Linux, Command line
  • Unit calculations, unit conversion and live currency conversion built in
  • Symbolic calculation including integrals and equations, with arbitrary precision
  • Write calculations as natural text with variables
  • Built-in currency, unit and time zone conversion
  • Currency rates need an internet connection to update
  • The sheer number of functions and settings is daunting at first
  • Licensing terms are set by an end user license agreement rather than an open license
  • Not a scientific or graphing calculator
Downloadable app Downloadable app
Open source Closed source
License: GPL-2.0 License not stated
No account needed Not stated if an account is needed
Works offline Not stated if it works offline

Checked September 21, 2026

Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.