Greek Small Letter Sigma
Lowercase sigma is the standard symbol for standard deviation in statistics, while the capital Σ is used for a sum. A line about spread or variance in a dataset almost always means this lowercase form. Reach for σ in equations, formulas and technical writing, where a plain keyboard falls short. It is cataloged at Unicode code point U+03C3 in the math set, so it renders the same real text character in every app that supports the font, not a pasted image.
| Symbol | σ | |
|---|---|---|
| Unicode | U+03C3 | |
| Name | Greek Small Letter Sigma | |
| HTML (named) | σ | |
| HTML (decimal) | σ | |
| HTML (hex) | σ | |
| CSS content | \03C3 | |
| JavaScript / JSON | \u03C3 | |
| UTF-8 bytes | 0xCF 0x83 | |
| UTF-16 units | 0x03C3 |
How to type the greek small letter sigma symbol
- Copy and paste: click the σ at the top of this page, then paste with Ctrl+V (Windows) or Cmd+V (Mac). This is the fastest route on any device.
- HTML: write
σor the named entityσin your markup. - CSS: use
content: "\03C3"in a::beforeor::afterrule. - JavaScript: the escape
\u03C3produces this character in a string.
Frequently asked questions
How do I copy the greek small letter sigma symbol?
Click the σ above or the copy button and it is placed on your clipboard. Paste it anywhere with Ctrl+V or Cmd+V. It is a real text character, so it works in documents, chats and code.
What is the Unicode code point for greek small letter sigma?
The greek small letter sigma has the Unicode code point U+03C3. In HTML you can write it as σ or σ, or with the named entity σ.
Does the greek small letter sigma symbol work everywhere?
In almost every modern app and font, yes. If a font does not include this glyph you may see a placeholder box, but the underlying character U+03C3 is still correct and will render in a font that supports it.
Related symbols
Browse the full math symbols hub, or return to the searchable symbol grid.