Ο
Capital Omicron Symbol (Ο)
Copy the Capital Omicron symbol Ο to your clipboard, and see its Unicode code point, HTML entity, LaTeX command and how to type it on any device.
What does Ο mean?
Ο is the capital form of Omicron, letter 15 of 24 in the Greek alphabet (pronounced OM-i-kron). Its lowercase counterpart is ο. In science and maths it is used for: Rarely used in formulas (looks like Latin o). Capital Omicron looks the same as the Latin capital O, so LaTeX has no separate command for it — write O (or \mathrm{O}) in math mode.
Codes and properties
| Character | Ο |
|---|---|
| Unicode name | GREEK CAPITAL LETTER OMICRON |
| Code point | U+039F |
| Decimal | 927 |
| Unicode block | Greek and Coptic |
| HTML entity | Ο · Ο · Ο |
| CSS | \039F |
| JavaScript / JSON | \u039F |
| Python | \u039F or \N{GREEK CAPITAL LETTER OMICRON} |
| UTF-8 bytes | CE 9F |
| LaTeX | O |
How to type Ο
- Copy & paste: press the Copy button above, then paste Ο anywhere — Word, Google Docs, email, chat or code.
- Windows (Word, WordPad, Outlook): type
039Fthen press Alt+X. In any app, Win+. opens the symbol panel. - Mac: switch to the Unicode Hex Input keyboard, hold Option and type
039F; or press Ctrl+Cmd+Space and search “greek capital letter omicron”. - Linux (GTK/IBus): press Ctrl+Shift+U, type
039f, then Space. - HTML:
Οrenders as Ο. - LaTeX:
Oin math mode.
Frequently asked questions
How do I type Ο on Windows?
In Microsoft Word type 039F and press Alt+X. In any app press Win+. to open the symbol panel, or copy Ο from this page.
What is the HTML code for Ο?
Use Ο or Ο (hex) or Ο (decimal).
What is the LaTeX command for Ο?
Use O in math mode.