Empty Set
∅ is the empty set, assigned to Unicode code point U+2205. Because it is a real text character rather than an image, it survives copy and paste into documents, chat apps, spreadsheets and source code. Copy it with one click below, or grab the exact HTML entity, CSS escape and JavaScript string for your project.
| Symbol | ∅ | |
|---|---|---|
| Unicode | U+2205 | |
| Name | Empty Set | |
| HTML (decimal) | ∅ | |
| HTML (hex) | ∅ | |
| CSS content | \2205 | |
| JavaScript / JSON | \u2205 | |
| UTF-8 bytes | 0xE2 0x88 0x85 | |
| UTF-16 units | 0x2205 |
How to type the empty set symbol
- Copy and paste: click the ∅ at the top of this page, then paste with Ctrl+V (Windows) or Cmd+V (Mac). This is the fastest route on any device.
- HTML: write
∅in your markup. - CSS: use
content: "\2205"in a::beforeor::afterrule. - JavaScript: the escape
\u2205produces this character in a string.
Frequently asked questions
How do I copy the empty set symbol?
Click the ∅ above or the copy button and it is placed on your clipboard. Paste it anywhere with Ctrl+V or Cmd+V. It is a real text character, so it works in documents, chats and code.
What is the Unicode code point for empty set?
The empty set has the Unicode code point U+2205. In HTML you can write it as ∅ or ∅.
Can I use the empty set symbol in HTML and CSS?
Yes. In HTML write ∅, and in CSS use content: "\2205" inside a ::before or ::after rule. The code table on this page has copy buttons for both.
Related symbols
Browse the full math symbols hub, or return to the searchable symbol grid.