Infinity Symbol (∞)
Copy the Infinity symbol ∞ to your clipboard, and see its Unicode code point, HTML entity, LaTeX command and how to type it on any device.
What does ∞ mean?
The infinity symbol denotes an unbounded quantity — something without limit. It is used to describe limits that grow without bound (lim → ∞), infinite intervals, and the bounds of improper integrals.
Codes and properties
| Character | ∞ |
|---|---|
| Unicode name | INFINITY |
| Code point | U+221E |
| Decimal | 8734 |
| Unicode block | Mathematical Operators |
| HTML entity | ∞ · ∞ · ∞ |
| CSS | \221E |
| JavaScript / JSON | \u221E |
| Python | \u221E or \N{INFINITY} |
| UTF-8 bytes | E2 88 9E |
| LaTeX | \infty |
How to type ∞
- Copy & paste: press the Copy button above, then paste ∞ anywhere — Word, Google Docs, email, chat or code.
- Windows (Word, WordPad, Outlook): type
221Ethen press Alt+X. In any app, Win+. opens the symbol panel. - Windows Alt code: hold Alt and type
236on the numeric keypad (Num Lock on), then release Alt. Works in Word, Notepad and most desktop apps. - Mac shortcut: press Option+5 (US keyboard layout).
- Mac (any symbol): switch to the Unicode Hex Input keyboard, hold Option and type
221E; or press Ctrl+Cmd+Space and search “infinity”. - Linux (GTK/IBus): press Ctrl+Shift+U, type
221e, then Space. - HTML:
∞renders as ∞. - LaTeX:
\inftyin math mode (amssymb package for some symbols).
Frequently asked questions
What does ∞ mean in a limit?
That the quantity increases without bound rather than approaching a finite value.
Is infinity a number?
No — it is a concept of unboundedness, used carefully in calculus and set theory rather than as an ordinary number.
How do I type ∞ on Windows?
In Microsoft Word type 221E and press Alt+X. In any app press Win+. to open the symbol panel, or copy ∞ from this page. You can also hold Alt and type 236 on the numeric keypad.
How do I type ∞ on a Mac?
Press Option + 5 on a US keyboard layout, or open the Character Viewer with Ctrl+Cmd+Space and search for it.
What is the HTML code for ∞?
Use ∞ or ∞ (hex) or ∞ (decimal).
What is the LaTeX command for ∞?
Use \infty in math mode.
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Reference: Unicode code chart: Mathematical Operators (U+2200–U+22FF)