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QALCULATE-GTK(1) General Commands Manual QALCULATE-GTK(1)


qalculate-gtk - Powerful and easy to use desktop calculator


qalculate-gtk [options] [expression]


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.

qalculate-gtk is the graphical user interface of Qalculate!.


-f, --file FILE
execute expressions and commands from a file
-n, --new-instance
start a new instance of the application
--title TITLE
specify the window title
-v, --version
show application version and exit

There are additional general options (not specific for the application) which can be listed with --help


Full documentation at or in the Help menu


Please report any bugs at


qalculate-gtk was written by Hanna Knutsson <>.
18 July 2021