Theta Symbol (θ)
Copy the Theta symbol θ to your clipboard, and see its Unicode code point, HTML entity, LaTeX command and how to type it on any device.
What does θ mean?
Theta is the go‑to symbol for an angle, especially in trigonometry and polar coordinates, where a point is written (r, θ). It also appears as a plane‑angle measure and, in options trading, as the rate of time decay. θ is the lowercase form of Theta, letter 8 of 24 in the Greek alphabet (pronounced THAY-ta). Its capital counterpart is Θ. In science and maths it is used for: Angles (especially in trigonometry), temperature.
Codes and properties
| Character | θ |
|---|---|
| Unicode name | GREEK SMALL LETTER THETA |
| Code point | U+03B8 |
| Decimal | 952 |
| Unicode block | Greek and Coptic |
| HTML entity | θ · θ · θ |
| CSS | \03B8 |
| JavaScript / JSON | \u03B8 |
| Python | \u03B8 or \N{GREEK SMALL LETTER THETA} |
| UTF-8 bytes | CE B8 |
| LaTeX | \theta |
How to type θ
- Copy & paste: press the Copy button above, then paste θ anywhere — Word, Google Docs, email, chat or code.
- Windows (Word, WordPad, Outlook): type
03B8then press Alt+X. In any app, Win+. opens the symbol panel. - Mac (any symbol): switch to the Unicode Hex Input keyboard, hold Option and type
03B8; or press Ctrl+Cmd+Space and search “greek small letter theta”. - Linux (GTK/IBus): press Ctrl+Shift+U, type
03b8, then Space. - HTML:
θrenders as θ. - LaTeX:
\thetain math mode (amssymb package for some symbols).
Frequently asked questions
Why is θ used for angles?
By long convention θ (and φ) label unknown angles in trigonometry, physics and engineering diagrams.
What is θ in polar coordinates?
The angle measured from the positive x‑axis to the point, paired with the radius r.
How do I type θ on Windows?
In Microsoft Word type 03B8 and press Alt+X. In any app press Win+. to open the symbol panel, or copy θ from this page.
How do I type θ on a Mac?
Open the Character Viewer with Ctrl+Cmd+Space and search “greek small letter theta”, or switch to Unicode Hex Input and hold Option while typing 03B8.
What is the HTML code for θ?
Use θ or θ (hex) or θ (decimal).
What is the LaTeX command for θ?
Use \theta in math mode.
Related symbols
Keep exploring
- All greek letters
- Full symbol library
- Math Keyboard — type θ with other symbols
- Greek alphabet reference with pronunciation
- Greek Letters Copy and Paste – Full List (Α–Ω) with Names
- How to Type Math Symbols Online (∑ ∫ √ ∂ π) – 2026 Guide
- How to Type Physics Symbols and Equations (ℏ ω λ Ω)
- Open the full scientific keyboard
Reference: Unicode code chart: Greek and Coptic (U+0370–U+03FF)