Qalculate!

Install on your computer · Instructions checked 2026-10-14

1. Open the provider Downloads page. Choose the documented installer, portable build or package for your operating system. The Windows package includes GTK, Qt and command-line interfaces.
2. Install the package or unpack the portable release, then start the GTK calculator.
3. Enter a simple expression or unit conversion and check the result against a known example.
4. Use the official manual for variables, plotting and online exchange-rate behavior. Optional plotting requires Gnuplot.

Steps reviewed against provider documentation, not a claim of installation or execution testing. Qalculate! is GPL-2.0 software, with free desktop and command-line editions. The GTK interface is linked here. Use the provider packages for your operating system; macOS uses the documented package/source options. It can replace calculation and unit-conversion tasks, not WolframAlpha's entire knowledge service or paid step-by-step tutor. Optional plotting needs Gnuplot; online exchange-rate updates contact external services.