Empty Set is the Unicode character ∅ at codepoint U+2205 in the Mathematical Operators block of the Basic Multilingual Plane (BMP). Click the character above to copy it to your clipboard — or use one of the
encodings below to embed it in HTML, CSS, JavaScript, Python or plain text.
Technical Reference
| Unicode Codepoint | |
| Decimal | |
| UTF-8 (hex) | |
| UTF-16 (hex) | |
| HEX Entity | |
| HTML Entity | |
| CSS (\xxxx) | |
| JavaScript | |
| Python |
How to Use Empty Set
To use the Empty Set symbol (∅) in HTML, insert the
entity ∅ directly into your markup. The decimal entity ∅ works in any HTML-serialised document.
In CSS pseudo-elements use content: '\2205';.
In JavaScript and TypeScript the escape '\u2205' evaluates to ∅. In Python source, write '\u2205'.
The character encodes to E2 88 85 as UTF-8 bytes and 2205 as UTF-16 code units. Its decimal codepoint is 8709.
This is a text-based Unicode character. It will render in the current font on most platforms. If a font lacks this glyph, the browser may show a placeholder or fall back to a system font.