Infinity symbol ∞

Infinity symbol ∞ (learn to type infinity sign on keyboard)Símbolo del infinito ∞ (aprende a teclear el signo infinito)
Infinity symbol snake

Infinity ∞ is a maths text symbol for an infinite number that people had been texting from the times when ASCII encoding was developed. And you can type it right from your keyboard. I'll show you how to do it by using different techniques depending on your Operating System and tastes.

Maths
Σπ½
Maths Emoji
Text symbols

What infinity mean

Ourobourus dragon

Infinity symbol created by John Wallis in 1655 refers to things without any limit. Usually is used in mathematics or physics to express that some things have no limit. For example, set of natural numbers has no limit and could be expressed by infinity ∞ sign. Infinity is designated as the symbol because it was imagined as a special variation of ouroborus snake - an ancient symbol depicting a serpent or dragon eating its own tail.

How to input infinity symbol

Choose your system to find out.

Windows

From Keyboard

Alt Codes

Shortcut technique that works on Desktops and most Laptops running MS Windows. You press Alt and, while holding it, type a code on Num Pad while it's turned on. Please, read a guide if you're running a laptop. You can type many frequently used symbols with this method.

Alt code Symbol
236
Shift States

Configure your keyboard layout in Windows so that you can type all additional symbols you want as easy as any other text. Takes about 5-10 minutes to set things up, but you'll be typing like a boss. You can assign infinity symbol ∞ and any other text characters to your keyboard using this technique.

Character Map

CharMap allows you to view and use all characters and symbols available in all fonts (some examples of fonts are "Arial", "Times New Roman", "Webdings") installed on your computer. You can input infinity symbol using it.

Mac

Emoji on iOS (iPhone, iPad and iPod touch)

How to input Emoji on iOS iPhone, iPod & iPad (illustrated)How to input Emoji on iOS iPhone, iPod & iPad Simple and beautiful way to discover how to add a virtual keyboard for Emoji symbols visible as small pictures. The keyboard itself is preinstalled on your iOS device, so you don't have to download, or buy anything.

Keyboard viewer

Mac keyboard viewer window

You can make frequently used technical non-fancy symbols like "√ ∑ π ∞ ∆ ™ © æ £ ¢" and åccénted letters on Mac using [Option] key. I've compiled a list of shortcuts in my article and explained how to open keyboard viewer. You can also use your Keyboard Viewer as an alternative to my list.

[Option] + [5] produces ∞ infinity sign.


Character Palette

Character Palette allows you to view and use all characters and symbols, including infinity, available in all fonts (some examples of fonts are "Arial", "Times New Roman", "Webdings") installed on your computer.


Linux

From Keyboard

Unicode hex code Symbol
221E

There actually are 3 different ways to type symbols on Linux with a keyboard. But only third and fourth level chooser keys and unicode hex codes can produce infinity text symbol.

Character map

Character map allows you to view and use all characters and symbols available in all fonts (some examples of fonts are "Arial", "Times New Roman", "Webdings") installed on your computer. It can also help you lookup Unicode codes for entering symbols with keyboard.

HTML code

Following is a list of HTML and JavaScript entities for infinity symbol. In Javascript you should write like a = "this \u2669 symbol" if you want to include a special symbol in a string.

HTML entity JS entity Symbol
∞ \u221e

Article updated on 2013-07-30 20:24:01