Empty Set
Unicode
U+2205
Decimal
8709
HTML entity
∅
HTML (numeric)
∅ · ∅
Alt code (Windows)
Alt + 8709
Category
Math symbols
Related characters
FAQ — Empty Set
What is the Unicode code of ∅ (Empty Set)?
The Empty Set character has the Unicode codepoint U+2205 (decimal 8709). Its HTML form is ∅, or ∅ (decimal) / ∅ (hex).
How do I type ∅ with an alt code?
On Windows, hold the Alt key and type Alt + 8709 on the numeric keypad. Or copy the character directly with the button above.
Which category does ∅ belong to?
Empty Set is in the "Math symbols" category.