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, symbolic calculations (including integrals and equations), arbitrary precision, uncertainty propagation, interval arithmetic, plotting, and a user-friendly interface (Gtk, Qt, and CLI).
Changes:
- Add support for display of repeating decimals using overline (vinculum) instead of ellipsis, and avoid repeated zero
- Support all real numbers in binomial(), comb(), and perm() functions
- Add boolean argument for reversed conversion (to text string) in bin(), oct(), dec(), hex(), and base()
- Add support for units in limit()
- Improve simplification and speed in diff() function for high orders
- Do not allow, or warn about, attempted conversion using "to" in function expression
- Show a warning when it appears as if the user tries to convert part of an expression
- Show error when trying to perform multiple conversions at same time using "to" command (without preceding expression on the same line)
- Improve handling of functions returning text string or value with angle unit, in angle and text arguments
- Improve handling of random numbers in iterative functions and in function arguments of custom functions
- Only convert right-hand side value for (in)equalities, when converting to dimensionless, angle, or non-linear units
- Use inverse for conversion from time unit to Hz
- Disable calculate as you type for expression containing export, load, or command function
- Use LANGUAGE environment variable, instead of LANG, on Windows in order to avoid changing regional format settings
- Add "language" option in qalc
- Reset exact value (for dual approximation) when applying "to" command in qalc
- Improvements/fixes for currencies and exchange rates
- Fix integral with infinite limit with unit
- Fix non-localized data set key properties (when translated version is available)
- Fix angle conversion for (in)equalities (both sides where converted)
- Fix default separator in load() and export() functions
- Fix µ_B name/symbol for Bohr magneton
- Fix incorrect limit for expression containing tan(x) when value to approach is pi/2 without direction
- Fix handling of a single vector argument in times() function
- Fix autocalculate input offset with readline vi mode
- Fix abort using SIGINT (Ctrl+C) during factor command
- Traditional Chinese translation
- Minor bug fixes and feature enhancements
Download the source code here:
libqalculate-5.6.0.tar.gz
Download the source code for the graphical user interfaces (qalculate-gtk and qalculate-qt) here:
qalculate-gtk-5.6.0.tar.gz
qalculate-qt-5.6.0.tar.gz
Download Windows binaries here:
64-bit installer
64-bit zip (unpack and run without further installation; no application data are read or written outside of the unpacked directory)
The binaries can also be installed using the Windows Package Manager (winget). The 64-bit binaries requires Windows 10 (1809) or later. 32-bit binaries (installer and zip), with support for Windows 7, are also available but do not include the Qt GUI (updated 2025-04-22 with fix for Windows 7).
GNU/Linux binaries:
flatpak packages (recommended) are available at https://flathub.org/apps/details/io.github.Qalculate.qalculate-qt (Qt GUI) and https://flathub.org/apps/details/io.github.Qalculate (GTK GUI).
snap packages are available at https://snapcraft.io/qalculate-qt (Qt GUI) and https://snapcraft.io/qalculate (GTK GUI).
64-bit (x86) self-contained binaries (GTK GUI) (extract and run from anywhere on most GNU/Linux distributions; no translations included)
For more information visit the website at http://qalculate.github.io/.