Copy and paste the empty set symbol ∅ — click the button or any variant below
Empty Set Symbol Copy and Paste
Click any symbol below to copy it to your clipboard instantly.
∅Empty SetCopied!
⌀Diameter SignCopied!
ØLatin O with StrokeCopied!
Unicode Character
∅
Unicode Hex
U+2205
HTML Entity
∅
Decimal Code
8709
About the Empty Set Symbol
Last reviewed on October 1, 2026
The empty set symbol ∅ denotes the set with no elements, {}. It is often confused with the diameter sign ⌀ and the Scandinavian letter Ø — they look alike but are different characters.
Where ∅ is used
Set theory: A ∩ B = ∅ means A and B share no elements.
Solution sets of equations with no solution.
Database and logic texts for an empty result.
Related characters
Browse the full Mathematical Symbols list, or pick a sibling character from the grid below.
How to Type the Empty Set Symbol
Windows: Type 2205 then press Alt+X in Word to convert it into ∅
Mac: Press Ctrl+Cmd+Space to open the Character Viewer and search for “empty set”
Microsoft Word: Type 2205 then press Alt+X to convert it into ∅
LaTeX:\emptyset in math mode
HTML: Use the entity ∅ or the numeric code ∅
Phone & tablet: Copying ∅ from this page is fastest — see our mobile typing guide for keyboard tricks
Empty Set Symbol Code for HTML, CSS & JavaScript
HTML: ∅
CSS: content: '\2205';
JavaScript: '\u2205'
Unicode: U+2205
Frequently Asked Questions
How do I type the empty set symbol ∅ on Windows?
Type 2205 then press Alt+X in Word to convert it into ∅. You can also copy ∅ straight from this page — it pastes into any app.
How do I type ∅ on a Mac?
Press Ctrl+Cmd+Space to open the Character Viewer and search for “empty set”.
What is the Unicode and HTML code for the empty set symbol?
The empty set symbol is Unicode code point U+2205. In HTML, use ∅ or the numeric reference ∅.
How do I write ∅ in LaTeX?
Use \emptyset in math mode, for example $\emptyset$.
What is the difference between ∅, ⌀ and Ø?
∅ (U+2205) is the empty set in math. ⌀ (U+2300) is the diameter sign used in engineering drawings. Ø (U+00D8) is a letter in Danish and Norwegian. Pick the one that matches your meaning.