Qalculate! – An Open-Source Multi-Purpose Calculator

Qalculate! is a robust cross-platform desktop calculator that is simple to use and equally capable of performing complex math calculations as well as other calculative tasks like percentage calculation and currency conversion.

What is awesome about Qalculate! is that it works with a library that features tons of customizable functions which make it excellent at unit conversions, plotting graphs, interval arithmetic, and symbolic calculations like differentiation, among other math problems.

Qalculate! is also capable of keeping the history of your calculations, a feature that comes in handy when making lengthy calculations or solving long math problems (typical of Calculus).

When you launch Qalculate! you will notice its straightforward workflow. It has a typical menu bar with file, edit, and help options. The other options are for setting the mode you want the app to be in while you use it, the variables you will be working with, and the units.

Qalculate Desktop Calculator
Qalculate Desktop Calculator

If you need any guidance to use the app or ever get stuck along the line there’s an online manual that you will find handy.

Features in Qalculate!

  • Free and open-source with source code available for contribution on GitHub.
  • Cross-Platform: Available for GNU/Linux, Windows, and Mac.
  • A comprehensive online manual here.
  • An online reference here.
  • Customizable functions.
  • A modern, minimalist, and Customizable UI.

See the complete list of features here.

Qalculate! is available to download on Ubuntu and other Linux distros as a snap app and all you need is a single command.

$ sudo snap install qalculate

Don’t have snapd? let’s set up for snaps using following commands.

$ sudo apt install snapd  [On Ubuntu/Debian]
$ sudo dnf install snapd  [On Fedora]
$ yaourt -S snapd         [On Arch Linux]

What do you think about Qalculate!. It is not Mathlab but it sure gets the job done.

Got other suggestions for us to check out? The comments section is down below.

Divine Okoi is a cybersecurity postgrad with a passion for the open-source community. With 700+ articles covering different topics in IT, you can always trust him to inform you about the coolest tech.

Each tutorial at GeeksMint is created by a team of experienced writers so that it meets our high-quality writing standards.

5 thoughts on “Qalculate! – An Open-Source Multi-Purpose Calculator”

  1. Just so you know, the .deb packages are for older versions. For example, the Bionic version is 0.9.9-1 whereas the Snap version is 2.6.1 and it’s a whole different beast. As for the Qalculate! program itself, I installed it today (both ways, that’s how I knew something was wrong) and Mr. Okoi is correct, this thing rocks. Even if I powder my slide rules for speed, they cannot readily do what this does quite easily.

    I’m not a fan of Snaps or Flatpaks either, but they are here to stay, and in this case where you do not need to be out of “the sandbox” much, it is sort of OK.

    Thank you sir for letting us know about Qalculate!

  2. I–and I’m sure most all others would also–totally agree with the first commenter: if I can’t install this by typing ‘sudo apt-get install qalculate’, I’m not going to use it. Period.

    I’m tired of Linux being made ‘cute’, or “…easier to use…” via added complexity. Does the term ‘systemd’ ring a bell?

  3. Looks cool. Just one problem…snap package? I’m under the conclusion that this is what happens when a Windows developer tries to do something nice for Linux so he/she doesn’t feel as bad about dual booting, Virtual Box, or WSL, but takes the easy way and so we get a snap package instead. Snaps are just one step away from having a store like Windows or Apple. Dear double-agents, learn to make or deb or rpm or don’t bother. Open source something all you like, but if I can’t compile a package from what history says will be an abandoned project (snap) in five years, how does this help anyone if only for archival purposes? But, Ubuntu is likely to be bought or heavily influenced (stock) by Microsoft when Canonical IPOs when they’re satisfied with GNOME from all of that tax-free bonus money the new head of GitHub, a former founder of GNOME, recieved. Oh excuse me, I meant to say “anonymous” $1M donation. -_- And of course, Microsoft is going to keep snaps around because it’s familiar to them. It’ll help when they DaaS Ubuntu too.


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