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:
- Place expression field below history by default
- Avoid display of completion list for non-decimal numbers, text arguments, and x, y, z
- Optional custom button column in keypad (four buttons shown regardless keypad types)
- Calculate-as-you-type improvements and fixes
- Improve automatic digit groups, in input, for non-decimal numbers and group sizes other than 3
- Add --update-exchange-rates command line option
- Fix tooltips for warning and flag in result when expression is placed below history
- Fix curly brackets replaced with parentheses in subfunctions (interferes with default values)
- Hide keep above option, in preferences, on Wayland
- Improve speed of sort(), rank(), and mode() functions (and other dependent functions) (libqalculate)
- Parse ± before implicit multiplication when not preceded by number (e.g. "7 km ± 5m") (libqalculate)
- Always consider x^(a + b) equivalent to x^a × x^b (fixes "x^(y + z) − x^y × x^z") (libqalculate)
- Simplify (x = a || x ≥ a + 1) and (x ≤ a || x ≥ a + 1), and similar, when x and a are integers (fixes "abs(x − 1) = abs(1 − x)") (libqalculate)
- Do not remove duplicate whitespace characters from text strings (in quotation marks) (libqalculate)
- Fix floating point conversion when comma is used as decimal separator (libqalculate)
- Fix (almost) endless loop with increasingly complex equations in some cases when x + x^(1/a) is transformed to x = (b − x)^a) (libqalculate)
- Fix and improve function() function (libqalculate)
- Fix crash on Windows during output of extremely small or large (> 10^323228497) floating point number (libqalculate)
- Minor bug fixes and feature enhancements
Download the source code here:
qalculate-qt-5.9.0.tar.gz
Download the source code of libqalculate here:
libqalculate-5.9.0.tar.gz
Windows binaries:
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 requires Windows 10 (1809) or later. They can also be installed using the Windows Package Manager (winget) or Chocolatey.
GNU/Linux binaries:
A flatpak package is available at https://flathub.org/apps/details/io.github.Qalculate.qalculate-qt.
For more information visit the website at http://qalculate.github.io/.