Sigma symbol
The sigma symbol σ and its close relatives, with the keyboard shortcut for each one.
U+03C3
Sigma symbol and related symbols
4 symbols, each with its codes and shortcuts.
| Symbol | Name | Code | HTML | Windows | Mac | LaTeX |
|---|---|---|---|---|---|---|
| Greek small letter sigma | U+03C3 | σ | Alt + 229 | \sigma | ||
| Greek capital letter sigma | U+03A3 | Σ | Alt + 228 | \Sigma | ||
| Greek small letter final sigma | U+03C2 | ς | \varsigma | |||
| N-ary summation | U+2211 | ∑ | Option + W | \sum |
About the sigma symbol
Lowercase σ is standard deviation in statistics. Capital Σ, and the separate summation sign ∑, mean add everything up. ς is the form used at the end of Greek words.
Common uses: statistics, sums in math and the sigma meme.
- Unicode name
- Greek Small Letter Sigma
- Code point
- U+03C3
- Windows
- Alt + 229
- Mac
- Character Viewer
How to type σ
Copy and paste
Click the big σ at the top. It copies instantly.
Windows
Hold Alt and type 229 on the number pad, then let go of Alt. In Word, type 03C3 and press Alt + X. Anywhere else, press Windows key + . (period) and search the symbols tab.
Mac
The Character Viewer (Control + Command + Space) finds any symbol by name.
iPhone and Android
Copy it from this page, or set up a text replacement in your keyboard settings so a short code like ;sym turns into the symbol.
HTML
Use σ or σ.
LaTeX
Use \sigma in math mode.
Questions people ask
How do I type σ on a keyboard?
On Windows, hold Alt and type 229 on the number pad. Mac users can find it in the Character Viewer (Control + Command + Space).
How do I type σ in Word?
Type 03C3 and press Alt + X straight after it. Word turns the code into σ.
What does σ mean?
Lowercase σ is standard deviation in statistics. Capital Σ, and the separate summation sign ∑, mean add everything up. ς is the form used at the end of Greek words.
Where is σ used?
Statistics, sums in math and the sigma meme.
More symbols
Updated November 13, 2026