Qalculate! is a multi-purpose cross-platform desktop calculator. It is small and simple to use but with much power and versatility underneath. Features include customizable functions, units, arbitrary precision, plotting, and a user-friendly interface (GTK+ and CLI).
The main focus of version 2.2 is interval arithmetic, which can be used for determination of the number of significant digits in the final result or direct calculation with intervals of numbers. Note that more work is needed to avoid unnecessary interval widening for non-trivial expressions with dependent variables.
List of main changes:
- Interval arithmetic
- Digit grouping.
- Enhanced display of parsed expression.
- Use 10^n instead of E-notation for main result display by default.
- Bitcoin support (frequent exchange rate updates are recommended).
- Use 'X' and 'E' (or appropriate Unicode characters), instead of 'A' and 'B', in duodecimal numbers (base 12).
- Option to disable units in physical constants.
- Fixed engineering mode.
- Various bug fixes and minor feature enhancements.
Download the source code here:
qalculate-gtk-2.2.0.tar.gz
Download the source code of libqalculate version 2.2.0 here:
libqalculate-2.2.0.tar.gz
Download the installer for Windows here:
qalculate-2.2.0.msi
A binary snap package, with all dependencies included, is available for those using a slow-moving GNU/Linux distribution (install with the command "sudo snap install qalculate").
For more information visit the website at http://qalculate.github.io/.