HTML <sup> Tag

The HTML <sup> tag represents superscript text in an HTML document.

Subscripts and superscripts are often used in mathematical expressions and in languages such as French as a convention to represent some abbreviations.

The <sup> element should only be used to mark up typographical conventions with specific meanings. Generally, it should only be used in cases where, the absense of the element would change the meaning of the content. It should not be used solely for presentation purposes.

The same principle applies to the <sub> tag (which represents subscript text).


The <sup> tag is written as <sup></sup> with the superscript text inserted between the start and end tags.

Like this:



Attributes can be added to an HTML element to provide more information about how the element should appear or behave.

The <sup> element accepts the following attributes.


Global Attributes

The following attributes are standard across all HTML elements. Therefore, you can use these attributes with the <sup> tag , as well as with all other HTML tags.

For a full explanation of these attributes, see HTML 5 global attributes.

Event Handlers

Event handler content attributes enable you to invoke a script from within your HTML. The script is invoked when a certain "event" occurs. Each event handler content attribute deals with a different event.

Most event handler content attributes can be used on all HTML elements, but some event handlers have specific rules around when they can be used and which elements they are applicable to.

For more detail, see HTML event handler content attributes.