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Qalculate!

- the ultimate desktop calculator


Qalculate! is a multi-purpose cross-platform desktop calculator. It is small and simple to use but with much power and versatility underneath. Features include customizable functions, units, arbitrary precision, plotting, and a user-friendly interface (GTK+ and CLI).



This project welcomes new developers. Visit the project page here.

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Latest News

.: 2017-10-02 :. Qalculate! version 2.1 released

The main focus of version 2.1 is consistent handling of roots of negative numbers and equation solving enhancements. Get the new version from the downloads page.

List of main changes:
  • Equation solving enhancements.
  • root() and cbrt() now always returns the real root (e.g. cbrt(-8)=-2), while fractional powers return the principal root ((-8)^(1/3)=1+1,73i).
  • Enhanced simplification.
  • More than 100 additional currencies (using mycurrency.net).
  • Fix automatic prefix for negative values.
  • Fix optimal unit conversion for cbrt(L) and similar.
  • Fix wrong partial calculation of square root in exact mode in some cases
  • Highlighting of matching parentheses. (GUI)
  • Proper display of roots and absolute value. (GUI)
  • Minor bug fixes and feature enhancements.