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- Infinity Symbol (∞)
Infinity Symbol (∞)
Tap Copy to get ∞, or see how to type it below.
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- Windows, Mac, HTML
- Unicode name
INFINITY
U+221E · HTML ∞ · in Unicode since 1.1 (1993)
Infinity variants
How to type ∞ on any device
| Where | How |
|---|---|
| Windows | Hold Alt and type 236 on the numeric keypad, then release Alt. Or press Windows + . (period), open Symbols and pick it. |
| Mac | Press Fn/Globe + E (or choose Edit > Emoji & Symbols) to open the Character Viewer, then search for infinity. |
| HTML | ∞ or ∞ |
| CSS | content: "\221E"; |
| Unicode | U+221E INFINITY |
| LaTeX | \infty |
| Phone or anywhere else | Tap the Copy button above and paste it. |
Lookalikes to avoid
| Character | Unicode name | Code point | What it is for |
|---|---|---|---|
| ∝ | PROPORTIONAL TO | U+221D | PROPORTIONAL TO, a math sign that looks like an open infinity. |
| ♾ | PERMANENT PAPER SIGN | U+267E | PERMANENT PAPER SIGN. With the emoji selector (♾️) it's the infinity emoji, drawn in color on most phones. |
A short history
The English mathematician John Wallis introduced the symbol with its mathematical meaning in 1655, in De sectionibus conicis. In Unicode it's ∞ (U+221E INFINITY), part of the Mathematical Operators block.
Frequently asked questions
What is the Alt code for infinity?
Hold Alt and type 236 on the numeric keypad.
How do I write infinity in LaTeX?
Use \infty in math mode.
What's the HTML code for ∞?
∞ or ∞.