Theta symbol (θ Θ): copy and paste
Theta (θ) is the eighth letter of the Greek alphabet. In math and physics it is the default name for an unknown angle (sin θ) and in statistics for an unknown parameter; capital Θ appears in big-Theta complexity notation.
There is no Option-key shortcut for θ on the US Mac layout, so copy it from here, use the Character Viewer, or add the Greek keyboard. The script variant ϑ is a stylistic alternative used in some physics texts.
Theta symbol variants to copy
Click any character to copy it.
How to type θ on Mac, Windows and phone
There is no keystroke for θ on the US Mac layout. Press ⌃ Control + ⌘ Command + Space to open the Character Viewer, search “theta” and double-click it. No keystroke on the US layout. In the Greek input source it is the U key.
On Windows, hold Alt and type 233 on the numeric keypad (Num Lock on), then release Alt. Gives capital Θ. Lowercase θ: Win + . then Symbols, or 03B8 followed by Alt + X in Word.
Not on the default keyboards. Add the Greek keyboard in Settings, or paste from here.
| Platform | How to type θ |
|---|---|
| Mac (US layout) | Character Viewer → search “theta” |
| Windows | Alt + 233 |
| Any Mac app | Emojibar: click the menubar icon, search “theta symbol”, click to copy |
Theta symbol codes for HTML, CSS and LaTeX
| Unicode | U+03B8 / U+0398 |
| HTML | θ Θ · θ Θ |
| CSS content | "\03B8 \0398" |
| LaTeX | \theta \Theta |