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SpeedCrunchQalculate!
Free

Free and open source under the GPL.

 Free

Free and open source under the GPL.

Windows, macOS, Linux Windows, macOS, Linux
  • Results update as you type
  • Up to 50 digits of precision
  • Unit calculations, unit conversion and live currency conversion built in
  • Symbolic calculation including integrals and equations, with arbitrary precision
  • Latest advertised release is the long-standing 0.12
  • Keyboard-centred design may not suit button-only users
  • Currency rates need an internet connection to update
  • The sheer number of functions and settings is daunting at first
Downloadable app Downloadable app
Open source Open source
License: GPL-2.0-or-later License: GPL-2.0
No account needed No account needed
Works offline Works offline

Checked October 2, 2026

Checked September 21, 2026

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