What is a good graphical Calculator Application for Linux?

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    Software Recommendations is the place to ask questions like this. – Barmar Sep 26 '18 at 16:31
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    @DoritoStyle Software recommendations are on-topic here. This is however a very bad one that should not have amassed such a large number of upvotes but rather closed as unclear - it lacks every information necessary to answer. – pipe Sep 26 '18 at 23:23
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    On the basis of my previous comment I've flagged this for closure until OPs definition of "good" is added, otherwise it will just be a list of every calculator software. Maybe fine 10 years ago, but not these days. – pipe Sep 26 '18 at 23:25
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    @pipe My way of interpreting "good" is "useful" according to two criteria. 1. It works like a calculator works, not like an IDE. 2. It works in an intuitive way that doesn't require any knowledge of programming. That's a reasonable definition of good for a question like this, not very fuzzy in the context of a question about a graphical calculator application, and I also don't like setting impossible standards of refinement for formulating questions or else we could close almost anything. – karel Sep 28 '18 at 12:36

Most famous ones are:

  • Gnome Calculator
  • galculator
  • xcalc
  • kcalc

They all have basic and scientific modes.

By default Ubuntu comes with "Gnome calculator" unless you are using a specific flavor of Ubuntu.

Gnome Calculator:

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For example in "Kubuntu" you should have "kcalc".


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There are other options available too like "xcalc", I use galculator myself, install it using:

sudo apt install galculator

It's lightweight and really fast, doesn't have much dependencies, easy to use and has nice features.

Paper Mode:

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Scientific view:

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If you are looking for something with more features then I guess you are looking for "Extcalc".

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  • I like galculator a lot -- it came default with 16.04 MATE, and toggles between algebraic and RPN as well as turning on-off scientific functions and some other stuff I never use. I may have to give extcalc a try, too. – Zeiss Ikon Sep 26 '18 at 13:49
  • I like kcalc a lot because all I need is a simple adding machine. Now, if it only had a "tape"/history feature! The only calculators I found that have it are way too complicated for my needs. – Joe Sep 27 '18 at 7:07

I am personally a fan of speedcrunch, because it has a decent list of common physical and chemical constants and remembers your history across sessions:

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As noted in the comments by @Michael:

[It is also] easy to mix/convert hex, bin and decimal representations of numbers. With mask() and unmask() it’s also possible to reduce/extend numbers to certain bit widths.

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    As a digital design engineer I also love it because it’s so easy to mix/convert hex, bin and decimal representations of numbers. With mask() and unmask() it’s also possible to reduce/extend numbers to certain bit widths. – Michael Sep 27 '18 at 9:18
  • @Michael I have never used it for this, but this sounds like I might in the future, instead of doing it in Python. – Graipher Sep 27 '18 at 9:20

If your calculations involve units, such as with physics or electronics equations, I would recommend Qalculate.

It supports using units in expressions, so you do not have to worry about unit conversions manually. It is also a good check for whether you have typed the correct equation (this is called Dimensional analysis).

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  • I love qalculate. It works fine under Windows too. – Eric Duminil Sep 26 '18 at 20:05

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