Greek Capital Letter Omega
Block: Greek and Coptic
- Symbol
- Ω
- Unicode
U+03A9- Unicode name
- GREEK CAPITAL LETTER OMEGA
- Block
- Greek and Coptic
- Category
- Letter, Uppercase
- Type
- Unicode character
Greek Capital Letter Omega (Ω) is encoded as U+03A9 and has the formal Unicode name GREEK CAPITAL LETTER OMEGA. Unicode classifies it as Letter, Uppercase in the Greek and Coptic block. The Greek capital letter omega. The code point is the stable identifier when fonts, copy-and-paste, or surrounding context make the glyph ambiguous.
The Practical Role of Ω
The Greek capital letter omega.
If your character differs from this one, try what does the Ω symbol mean? to find the exact mark from pasted text, Unicode, or visual clues.
When the Exact Ω Character Matters
Use Ω when the text is intended to contain Greek Capital Letter Omega (U+03A9).
This is a character-identity rule rather than a style preference. Search, normalization, parsing, sorting, and copy-and-paste workflows can distinguish code points even when a reader cannot immediately see the difference.
How Context Narrows the Meaning of Ω
Ω is encoded as U+03A9 and classified as Letter, Uppercase.
The Unicode identity and the surrounding document answer different questions: the code point tells you which character is present, while the surrounding formula, interface, document, or notation system determines the local interpretation. Keeping those layers separate prevents a visual guess from being treated as a character definition.
Code-Point and UTF-8 Forms for Ω
U+03A9 = decimal 937 = HTML Ω / Ω. A Unicode escape-style form is u03A9. Its UTF-8 bytes are CE A9.
Use these identifiers in markup, source code, exports, or character diagnostics when the glyph alone is not enough.
Ω Compared With ω, O, and Ω
This character is linked with nearby or confusable records including ω Greek Small Letter Omega (U+03C9), O Latin Capital Letter O (U+004F), and Ω Ohm Sign (U+2126). The relationship is useful for identification, but it does not make those characters interchangeable.
Fonts can reduce or exaggerate visual differences, so use each character's Unicode value and name when the distinction matters. Replacing one code point with another can change meaning, search behavior, parsing, sorting, or typography even when the glyphs appear close on screen.