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Qalculate!

- the ultimate desktop calculator


Qalculate! is a multi-purpose cross-platform desktop calculator. It is simple to use but provides power and versatility normally reserved for complicated math packages, as well as useful tools for everyday needs (such as currency conversion and percent calculation). Features include a large library of customizable functions, unit calculations and conversion, physical constants, symbolic calculations (including integrals and equations), arbitrary precision, uncertainty propagation, interval arithmetic, plotting, and a user-friendly interface (GTK+ and CLI).

Qalculate! is free software, licensed under the GNU Public License v2 (or later).


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

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Latest News

.: 2019-07-22 :. Qalculate! version 3.3 released

List of changes:
  • Support for number bases > 32, as well as negative and non-integer number bases
  • Support for all number bases, including non-numerical, and specification of digits in base() function
  • dBm and dBW units
  • Support both micro sign and small mu as symbol for micro prefix
  • New programming keypad icon
  • Import definitions action in GUI
  • Fix parsing of "0x80 mod 3" and similar
  • Reduce length of expressions in warnings and errors (primarily when using high precision)
  • Improved handling of interval arithmetic for cubic equations
  • Minor bug fixes and feature improvements
For details see the changelogs for libqalculate and qalculate-gtk. Get the new version from the downloads page.