Greek Theta Symbol HTML entity &thetasym;

&thetasym; is the HTML entity for Greek Theta Symbol ϑ (U+03D1). Copy ϑ, ϑ and the CSS, JavaScript, Python and URL escapes.

Entity: &thetasym;
Also written: ϑ ϑ
Code point: U+03D1
Unicode name: GREEK THETA SYMBOL
Block: Greek and Coptic
Category: Lowercase letter (Ll)
Since: Unicode 1.1
Defined in: HTML 4.01 and HTML5

Codes to copy

HTML named	`&thetasym;`Works in HTML; in XML only & < > " ' are predefined.
HTML decimal	`ϑ`Works in HTML and XML.
HTML hex	`ϑ`Works in HTML and XML.
CSS	`content: "\3D1";`In a stylesheet, for ::before and ::after.
JavaScript	`"\u03D1"`Also valid in JSON.
Python	`"\u03d1"`Python 3 string literal.
Python by name	`"\N{GREEK THETA SYMBOL}"`Readable alternative using the Unicode name.
URL	`%CF%91`Percent-encoded UTF-8 bytes, for a path or query value.
UTF-8 bytes	`CF 91`2 bytes.
UTF-16	`03D1`1 code unit, which is what JavaScript length counts.

When to use it

&thetasym; writes U+03D1 (Greek Theta Symbol), 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).