Omega Symbol
About Omega Symbol
Ω is the Omega Symbol, the twenty-fourth letter of the Greek alphabet in its uppercase form. Ω denotes electrical resistance in ohms, the omega constant, and symbolises the end or the greatest in many contexts.
【Pronunciation】 In English, Ω is most often pronounced oh-MEG-uh (IPA: /oʊˈmɛɡə/). This is simply the anglicized name of the Greek letter.
The uppercase Omega Symbol Ω is written as a distinct capital Greek glyph and is assigned codepoint U+03A9 in the Greek and Coptic Unicode block. Its uppercase form is unmistakably Greek and clearly distinct from any Latin letter.
【Historical Origin】 Like every Greek letter, Ω was adapted from a Phoenician consonant and entered mathematical and scientific notation through the work of ancient Greek scholars, remaining in continuous use to the present day.
【Common Uses】 Ω is highly active across disciplines and frequently appears alongside other Greek capitals such as Δ (Δ), Σ (Σ), Π (Π) and Ω (Ω) in formulas, papers, and engineering drawings. Its clear shape and long tradition make it a standard symbol in many fields.
How to Type Omega Symbol
Windows Input
Method 1: Hold Alt and type 937 on the numeric keypad, then release Alt to get Ω.
Mac Input
Method 2: Press Control + Command + Space to open the Character Viewer, search for "greek" or "Omega Symbol", then select Ω.
HTML/CSS Input
HTML: Ω or Ω; CSS: content: "\03A9";
LaTeX Input
Use the \Omega command in LaTeX math mode to produce Ω.
Omega Symbol FAQ
How is Ω pronounced?
The English pronunciation of Ω is oh-MEG-uh (IPA: /oʊˈmɛɡə/). It is the anglicized name of the Greek letter, used directly rather than described as "uppercase Ω".
What is the difference between Ω and the Latin letter O?
Ω (U+03A9) is a distinct Greek capital with its own codepoint and shape, unrelated to any Latin letter; it is never confused with a Roman character.
How do I type Ω in Word, web pages, and LaTeX?
On Windows use Alt+937 on the numeric keypad; on Mac open the Character Viewer and search "greek" or "Omega Symbol"; on the web use the HTML entity Ω; in LaTeX use \Omega.