Copy and paste the iota symbol ι — click the button or any variant below
Iota Symbol Copy and Paste
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ΙCapital IotaCopied!
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Unicode Character
ι
Unicode Hex
U+03B9
HTML Entity
ι
Decimal Code
953
Capital Letter
Ι U+0399
About the Iota Symbol
Last reviewed on October 1, 2026
Iota is the ninth and smallest letter of the Greek alphabet — the origin of the English phrase “not one iota”.
Where ι is used
The index generator ι (⍳) in APL and the iota constant counter in Go.
Inclusion maps ι in category theory and topology.
Iota subscript (ͺ) in polytonic Greek text.
Related characters
Browse the full Greek Letters list, or pick a sibling character from the grid below.
How to Type the Iota Symbol
Windows: Type 03B9 then press Alt+X in Word for lowercase ι, or 0399 then Alt+X for capital Ι. There is no classic Alt code for iota
Mac: Switch to the Greek keyboard layout (System Settings → Keyboard → Input Sources), or press Ctrl+Cmd+Space and search for “iota”
Microsoft Word: Type 03B9 then press Alt+X to convert it into ι
LaTeX:\iota in math mode
HTML: Use the entity ι or the numeric code ι
Phone & tablet: Copying ι from this page is fastest — see our mobile typing guide for keyboard tricks
Iota Symbol Code for HTML, CSS & JavaScript
HTML: ι
CSS: content: '\03B9';
JavaScript: '\u03B9'
Unicode: U+03B9
Frequently Asked Questions
How do I type the iota symbol ι on Windows?
Type 03B9 then press Alt+X in Word for lowercase ι, or 0399 then Alt+X for capital Ι. There is no classic Alt code for iota. You can also copy ι straight from this page — it pastes into any app.
How do I type ι on a Mac?
Switch to the Greek keyboard layout (System Settings → Keyboard → Input Sources), or press Ctrl+Cmd+Space and search for “iota”.
What is the Unicode and HTML code for the iota symbol?
The iota symbol is Unicode code point U+03B9. In HTML, use ι or the numeric reference ι.