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Qalculate!Kalk
Free

Free and open source under the GPL.

 Free

Free and open source under the GPL-3.0-or-later.

Windows, macOS, Linux Linux
  • Unit calculations, unit conversion and live currency conversion built in
  • Symbolic calculation including integrals and equations, with arbitrary precision
  • Adapts to desktop and phone screens
  • Regular releases with KDE Gear
  • Currency rates need an internet connection to update
  • The sheer number of functions and settings is daunting at first
  • Linux only
  • Few details on advanced features in the research
Downloadable app Downloadable app
Open source Open source
License: GPL-2.0 License: GPL-3.0-or-later
No account needed No account needed
Works offline Works offline

Checked September 21, 2026

Checked October 1, 2026

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