Theta Symbol
About Theta Symbol
Θ is the Theta Symbol, the eighth letter of the Greek alphabet in its uppercase form. Θ denotes an angle in geometry, temperature in statistical mechanics, and the Chebyshev function in number theory.
【Pronunciation】 In English, Θ is most often pronounced THEE-tuh (IPA: /ˈθiːtə/). This is simply the anglicized name of the Greek letter.
The uppercase Theta Symbol Θ is written as a distinct capital Greek glyph and is assigned codepoint U+0398 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, Θ 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】 Θ 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 Theta Symbol
Windows Input
Method 1: Hold Alt and type 920 on the numeric keypad, then release Alt to get Θ.
Mac Input
Method 2: Press Control + Command + Space to open the Character Viewer, search for "greek" or "Theta Symbol", then select Θ.
HTML/CSS Input
HTML: Θ or Θ; CSS: content: "\0398";
LaTeX Input
Use the \Theta command in LaTeX math mode to produce Θ.
Theta Symbol FAQ
How is Θ pronounced?
The English pronunciation of Θ is THEE-tuh (IPA: /ˈθiːtə/). It is the anglicized name of the Greek letter, used directly rather than described as "uppercase Θ".
What is the difference between Θ and the Latin letter H?
Θ (U+0398) 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 Θ in Word, web pages, and LaTeX?
On Windows use Alt+920 on the numeric keypad; on Mac open the Character Viewer and search "greek" or "Theta Symbol"; on the web use the HTML entity Θ; in LaTeX use \Theta.