(!) Note that even though most planned features are in place and I personally find it highly stable and reliable in everyday use, Qalculate! definitely needs more testing and no guarantees whatsoever are given.
With that said, you are welcome to download the latest version of Qalculate! and report any bugs you find.
Qalculate! version 3.11.0 (source code):
Graphical user interface requirements:
Text interface requirements:
Use compatibility mode to avoid keyboard input issues with 32-bit version.
The portable file can be unpacked and run without further installation. No application data are read or written outside of the unpacked directory.
The 64-bit binaries can also be installed using the Windows Package Manager (winget).
Linux binaries:A snap package, with all dependencies included, is available at snapcraft.io/qalculate.
Use the above link or install with the command "sudo snap install qalculate".
A flatpak package is available at Flathub (flathub.org/apps/details/io.github.Qalculate).
Click the above link or use the command "flatpak install https://flathub.org/repo/appstream/io.github.Qalculate.flatpakref".
Self-contained binaries: qalculate-3.11.0-x86_64.tar.xz
Extract and run from anywhere on most GNU/Linux distributions.
Most distributions for Linux provides packages (which may or may not be outdated) for Qalculate!, and all its dependencies, which you can install using the distribution's standard installers.
A Mac OS X port is available here:
Qalculate! at MacPorts.
Old versions can be found at the project page for libqalculate and qalculate-gtk. Ancient versions are available at the old project page at sourceforge.net.
Qalculate! KDE Plasma widget