How to Type Infinity Symbol ∞
Keyboard shortcuts for Windows, Mac, Chromebook, iPhone & Android. Type or copy the infinity sign instantly.
Infinity & Math Symbols
Click any symbol to copy instantly
The infinity symbol ∞ represents endlessness and is used in mathematics, physics, philosophy, and as a popular design element in social media bios, tattoos, and branding. Its mathematical origin is the lemniscate, introduced by John Wallis in 1655.
This guide shows you how to type ∞ on every platform: Windows, Mac, Chromebook, iPhone, Android, and Linux. We cover alt codes, keyboard shortcuts, Unicode input, and the fastest copy-paste method.
Whether you need ∞ for a calculus equation, a social media bio, or a design project, all symbols on this page are pure Unicode text that works everywhere.
Inserting the ∞ Infinity Sign Anywhere
The infinity sign ∞ traces back to the lemniscate curve and today marks limitless quantities in mathematics and open-ended ideas in design. Its Unicode code point is U+221E, and the HTML entity ∞ (or ∞) renders it on any web page. Mac users have the cleanest shortcut of all: press Option+5 and ∞ appears instantly, no menu required. On Windows with a numeric keypad, hold Alt and type 236, which produces the same character through the classic Alt-code mapping; where that fails, Word accepts 221E followed by Alt+X to convert the code into the glyph.
Mobile keyboards do not expose ∞ directly, so the practical move on iPhone or Android is to copy it once and let autocorrect or your clipboard history offer it again later. Beyond calculus, where you write expressions like the limit as x approaches ∞, the sign shows up in physics notation, aperture and exposure settings in photography apps, jewellery and tattoo motifs, and brand logos that want to suggest something without end. Copy-paste remains the surest method across every platform.
Infinity Symbol FAQ
The alt code for ∞ is Alt+236. Hold Alt, type 236 on the numeric keypad, then release Alt. Num Lock must be enabled. This works in all Windows applications.
Press Option+5 on Mac to type ∞ directly. This keyboard shortcut works in all Mac applications — no Character Viewer or special setup needed.
The Unicode code point for ∞ is U+221E (INFINITY). In HTML, use ∞ or ∞. In URL encoding, it's %E2%88%9E. The infinity emoji ♾️ is a separate character at U+267E.
Yes! Both ∞ (text) and ♾️ (emoji) work in Instagram bios, captions, and comments. The text version ∞ is more compact and consistent across devices.
In mathematics, ∞ represents a quantity without bound or limit. It's used in calculus (limits, integrals), set theory (cardinality of infinite sets), and analysis. It's not a number but a concept representing unboundedness.
In Google Docs, go to Insert → Special Characters, then search for 'infinity'. You can also copy ∞ from this page and paste it with Ctrl+V (or Cmd+V on Mac).