Theta Symbol
Copy the uppercase or lowercase theta symbol (Θ θ) and find its Unicode codepoint, HTML entity, and LaTeX command.
Theta Symbol
Click the symbol to copy it
Formats
Character
θ
Unicode
U+03B8
HTML entity
θ
HTML decimal
θ
LaTeX
\theta
JS / JSON escape
θ
Click any row to copy that exact string.
Common Uses
| Field | Example | Meaning |
|---|---|---|
| Trigonometry | Theta is the standard variable for an unknown angle. | |
| Computer science | Big Theta notation: a tight asymptotic bound on running time. | |
| Options trading | The theta Greek: daily time decay of an option's premium. | |
| Meteorology | Potential temperature of an air parcel brought to a reference pressure. | |
| Statistics | A generic symbol for an unknown population parameter to estimate. |
Build an angle label
Type a number to build a ready-to-paste angle value using theta.
θ = 45°
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Summary
Copy the uppercase or lowercase theta symbol (Θ θ) and find its Unicode codepoint, HTML entity, and LaTeX command.
How it works
- Click the large theta symbol to copy it to your clipboard.
- Switch between uppercase (Θ) and lowercase (θ) with the toggle.
- Click any row in the formats list to copy that exact string: Unicode, HTML entity, or LaTeX.
- Paste the symbol anywhere: documents, spreadsheets, code, or chat.
Use cases
- Write an unknown angle in trigonometry or geometry, such as sin(θ) or cos(θ).
- Reference Big Theta notation in algorithm analysis, like Θ(n log n) for a tight asymptotic bound.
- Insert theta into an options pricing formula, where theta measures time decay of an option premium.
- Label potential temperature in meteorology or thermodynamics, commonly written as θ.
- Type theta as a parameter symbol in statistics or machine learning, such as a model parameter vector.
- Add theta to a physics report for angular displacement without a special keyboard layout.
Frequently Asked Questions
Last updated: 2026-07-22 ·
Reviewed by Nham Vu