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:
- Automatically recalculate expression with current time every second
- Replace edit-clear icon on keypad button with "C"
- Support non-existing X-variables in plot dialog
- Improve automatic digit grouping
- Add option to place percent/remainder button in number pad
- Add asterisk and middle dot as multiplication sign alternatives in preferences
- Add output in scientific (sci), engineering (eng), ans simple notation as "to"-operator options
- Add option to place expression field below history
- Add option to show a status bar (with angle unit and other input settings information)
- Improve completion
- Show warning about default assumptions the first time an equation is solved
- Show warning symbol when calculate as you type expression results in a question
- Show warning and ask for confirmation when deactivating interval arithmetic
- Fix floating point value in floating point conversion dialog for extended and microchip formats
- Fix updating of fields in plot dialog when expression list selection changes
- Fixes for comments and removal of single result
- Fix initial state of "Use E-notation instead of 10^n" in preferences
- Fix other angle units menu
- Improve support (and fix segfault) for exponential notation in hexadecimal numbers (libqalculate)
- Add TeX point, TeX scaled point, twip, agate, darcy, kayser, lambert, foot-lambert, and cc units (libqalculate)
- Add compton wavelength constants for muon, neutron, proton, and tau (libqalculate)
- Update calculation of fraction of year (with day counting basis 0 and 1) to match method used in spreadsheets other than Gnumeric (libqalculate)
- Change default quantile algorithm from 8 to 7 (libqalculate)
- Improve accuracy for intervals in solutions to equations when using interval arithmetic (libqalculate)
- Fix poolvar(), ttest(), cor(), dollarde() and dollarfr() functions (libqalculate)
- Fix inequality with 1/f(x) on one side, e.g. "1/(x-2) ≤ 2" (libqalculate)
- Fix segfault with extremely small numbers and high number of bits in floating point conversion (libqalculate)
- Fix crashes and freezes in some corner cases (libqalculate)
- Fix value of Planck unit (was rounded to 7 decimals) (libqalculate)
- Many minor bug fixes and feature enhancements
Download the source code here:
qalculate-qt-5.8.0.tar.gz
Download the source code of libqalculate here:
libqalculate-5.8.0.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 can also be installed using the Windows Package Manager (winget). Requires Windows 10 (1809) or later.
GNU/Linux binaries:
A flatpak package (recommended) is available at https://flathub.org/apps/details/io.github.Qalculate.qalculate-qt.
For more information visit the website at http://qalculate.github.io/.