galculator – algebraic and RPN calculator

galculator is an open source scientific calculator supporting algebraic mode as well as Reverse Polish Notation (RPN).

Its features include arithmetic precedence handling, mathematical functions, different number bases (DEC, HEX, BIN, OCT) and angle bases (radiant, degree, and grad). For a complete list of features, please see below.

galculator’s formula entry mode aims to provide all the features of the algebraic mode (and even to go further).

galculator is written entirely in C and uses GTK 2 / GTK 3 to provide an attractive graphical interface.

There hasn’t been any significant development of the calculator since 2015.

Features include:

• Algebraic mode, RPN (Reverse Polish Notation) and Formula Entry mode. Formula entry mode accepts decimal numbers as input as well as hexadecimal, binary and octal numbers.
• Paper mode – a very simple graphical user interface along with the functionality of formula entry mode. “Do your calculations as you would do them on a paper”.
• Decimal, hexadecimal, octal and binary number base.
• Radiant, degree and grad support.
• Arithmetic precedence.
• Basic and Scientific Mode. Basic mode is intended for simple computations. Scientific Mode is galculator’s most powerful operation mode.
• User defined constants.
• User defined functions – called with the fun button next to the constant button and work like the other function buttons like sin, cos, etc.
• Trigonometric functions.
• Power, sqare root.
• Natural and common logarithm.
• Inverse and hyperbolic functions.
• Memory functions.
• Logical operations.
• Display RPN stack.
• Preferences dialog/configuration file.
• Display modules.
• Configurable variable type in HEX/BIN/OCT mode.
• Thousands separator.
• Quad-precision floating point.
• 112-bit binary arithmetic on systems with libquadmath.
• Copy and paste functionality.
• Keyboard shortcuts for arithmetic operations, popup menus, functions, display control, and menu shortcuts.
• Internationalization support – available in more than 20 translations including Spanish, Turkish, French, German, Lithuanian, Hungarian, Russian, Slovakian, and Polish.

Website: galculator.mnim.org
Support: Documentation, GitHub Code Repository
Developer: Simon Floery
License: GNU GPL v2 or any later version

galculator is written in C. Learn C with our recommended free books and free tutorials.

Return to Calculators: Graphical Tools</a

Popular series
	The largest compilation of the best free and open source software in the universe. Each article is supplied with a legendary ratings chart helping you to make informed decisions.
	Hundreds of in-depth reviews offering our unbiased and expert opinion on software. We offer helpful and impartial information.
	Replace proprietary software with open source alternatives: Google, Microsoft, Apple, Adobe, IBM, Autodesk, Oracle, Atlassian, Corel, Cisco, Intuit, and SAS.
	Awesome Free Linux Games Tools showcases a series of tools that making gaming on Linux a more pleasurable experience. This is a new series.
	Machine Learning explores practical applications of machine learning and deep learning from a Linux perspective. We've written reviews of more than 40 self-hosted apps. All are free and open source.
	New to Linux? Read our Linux for Starters series. We start right at the basics and teach you everything you need to know to get started with Linux.
	Alternatives to popular CLI tools showcases essential tools that are modern replacements for core Linux utilities.
	Essential Linux system tools focuses on small, indispensable utilities, useful for system administrators as well as regular users.
	Linux utilities to maximise your productivity. Small, indispensable tools, useful for anyone running a Linux machine.
	Surveys popular streaming services from a Linux perspective: Amazon Music Unlimited, Myuzi, Spotify, Deezer, Tidal.
	Saving Money with Linux looks at how you can reduce your energy bills running Linux.
	Home computers became commonplace in the 1980s. Emulate home computers including the Commodore 64, Amiga, Atari ST, ZX81, Amstrad CPC, and ZX Spectrum.
	Now and Then examines how promising open source software fared over the years. It can be a bumpy ride.
	Linux at Home looks at a range of home activities where Linux can play its part, making the most of our time at home, keeping active and engaged.
	Linux Candy reveals the lighter side of Linux. Have some fun and escape from the daily drudgery.
	Getting Started with Docker helps you master Docker, a set of platform as a service products that delivers software in packages called containers.
	Best Free Android Apps. We showcase free Android apps that are definitely worth downloading. There's a strict eligibility criteria for inclusion in this series.
	These best free books accelerate your learning of every programming language. Learn a new language today!
	These free tutorials offer the perfect tonic to our free programming books series.
	Linux Around The World showcases usergroups that are relevant to Linux enthusiasts. Great ways to meet up with fellow enthusiasts.
	Stars and Stripes is an occasional series looking at the impact of Linux in the USA.