Greek Small Letter Sigma HTML entity σ

σ is the HTML entity for Greek Small Letter Sigma σ (U+03C3). Copy σ, σ and the CSS, JavaScript, Python and URL escapes.

Entity: σ
Code point: U+03C3
Unicode name: GREEK SMALL LETTER SIGMA
Block: Greek and Coptic
Category: Lowercase letter (Ll)
Since: Unicode 1.1
Defined in: HTML 4.01 and HTML5

Codes to copy

HTML named	`σ`Works in HTML; in XML only & < > " ' are predefined.
HTML decimal	`σ`Works in HTML and XML.
HTML hex	`σ`Works in HTML and XML.
CSS	`content: "\3C3";`In a stylesheet, for ::before and ::after.
JavaScript	`"\u03C3"`Also valid in JSON.
Python	`"\u03c3"`Python 3 string literal.
Python by name	`"\N{GREEK SMALL LETTER SIGMA}"`Readable alternative using the Unicode name.
URL	`%CF%83`Percent-encoded UTF-8 bytes, for a path or query value.
UTF-8 bytes	`CF 83`2 bytes.
UTF-16	`03C3`1 code unit, which is what JavaScript length counts.

When to use it

σ writes U+03C3 (Greek Small Letter Sigma), a small letter from the Unicode Greek and Coptic block, encoded since Unicode 1.1. In mathematics, single Greek letters are usually set in italic; MathML or a maths font handles that automatically.

The name dates from HTML 4, so it works in every browser and in old email clients.

More greek letters

All greek letters · Every HTML entity · Encode or decode text

Source: the WHATWG HTML Standard list of named character references and the Unicode Character Database (Unicode 18.0).