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HTML Entity Detail
HTML Entity - Infinity Sign
Infinity Sign is a mathematical operators, comparison symbols, and notation characters. This HTML entity enables web developers to display this character reliably across all browsers without encoding issues.
Symbol preview
∞
Unicode
U+221E
HTML entity
∞
CSS code
\221E
Usage Examples
Use this HTML entity in mathematical expressions and equations. For example, ≠ for not equal, ≤ for less than or equal, ∞ for infinity.
Related Entities
Common Mistakes
⚠️
Mistake: Using oo (double letter o) instead of ∞
Fix: Use ∞ (∞) for the infinity symbol. The "oo" notation is not standard mathematical notation.
Infinity Sign
Select any code to highlight it before copying.
Category: Math Symbol
| Unicode | U+221E |
|---|---|
| Hex Code | ∞ |
| HTML Code | ∞ |
| HTML Entity | ∞ |
| CSS Code | \221E |
| Windows Shortcut | |
| Mac Shortcut | ⌥, |
HTML code example
CSS code example
Last updated: 21 Jun 2026
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