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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

.: 2017-08-28 :. Qalculate! version 2.0 released

After a month of hard work Qalculate! version 2.0 is ready with removal of glib and cln dependencies from the library, a redesigned expression entry and keypad in the GUI, and a new feature complete Windows version. Get the new version from the downloads page.

List of main changes:
  • CLN has been replaced with GMP and MPFR for low-level numerical calculations.
  • The Glib dependancy has been removed. It has partly been replaced with libiconv and icu. Libqalculate can be compiled without them and libiconv is only used the CLI application.
  • GVFS and wget have been replaced by libcurl for exchange rates retrieval.
  • Date functions have been rewritten and now support much larger numbers.
  • Trigonometric functions with angle unit other than radians have been fixed.
  • Functions with more than one argument can now also be applied to the RPN stack, and enter on empty expression duplicates the stack register at the top.
  • New functions: airy(), arg(), besselj(), bessely(), conj(), digamma(), erf(), erfc()
  • Redesigned keypad with a lot more functionality. (GUI)
  • Multiline expression entry with undo/redo. (GUI)
  • Alternative simplified function creation dialog. (GUI)
  • Percentage calculation tool. (GUI)
  • Binary installer for Microsoft Windows.
  • Increased efficiency and many minor enhancements and bug fixes.
For a complee list of changes see the ChangeLogs (libqalculate and qalculate-gtk), or, for even more details, git logs (libqalculate and qalculate-gtk).