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The HTML Superscript element (<sup>) specifies inline text which is to be displayed as superscript for solely typographical reasons. Superscripts are usually rendered with a raised baseline using smaller text.

Content categories Flow content and phrasing content
Permitted content Phrasing content
Tag omission None, both the starting and ending tag are mandatory.
Permitted parents Any element that can contain phrasing content
Permitted ARIA roles Any
DOM Interface HTMLElement

Attributes

This element only includes the global attributes.

Usage notes

The <sup> element should only be used for typographical reasons—that is, to change the position of the text to comply with typographical conventions or standards, rather than solely for presentation or appearance purposes.

For example, using <sup> to style the wordmark of a business or product which uses a raised baseline should be done using CSS (most likely vertical-align) rather than <sup>. This would be done using, for example, vertical-align: super or, to shift the baseline up 50%, vertical-align: 50%.

Appropriate use cases for <sup> include:

  • Displaying exponents, such as "x3." It may be worth considering the use of MathML for these, especially in more complex cases. See Exponents under Examples below.
  • Displaying superior lettering, which is used in some languages when rendering certain abbreviations. For example, in French, the word "mademoiselle" can be abbreviated "Mlle"); this is an acceptable use case. See Superior lettering for examples.
  • Representing ordinal numbers, such as "4th" instead of "fourth." See Ordinal numbers for examples

Examples

Exponents

Exponents, or powers of a number, are among the most common uses of superscripted text.

<p>One of the most common equations in all of physics is
<var>E</var>=<var>m</var><var>c</var><sup>2</sup>.<p>

The resulting output looks like this:

Superior lettering

Superior lettering, is not technically the same thing as superscript. However, it is common to use <sup> to present superior lettering in HTML. Among the most common uses of superior lettering is the presentation of certain abbreviations in French:

<p>Robert a présenté son rapport à M<sup>lle</sup> Bernard.</p>

The resulting output:

Ordinal numbers

Ordinal numbers, such as "fourth" in English or "quinto" in Spanish may be abbreviated using numerals and language-specific text rendered in superscript:

<p>The ordinal number "fifth" can be abbreviated in various
languages as follows:</p>
<ul>
  <li>English: 5<sup>th</sup></li>
  <li>French: 5<sup>ème</sup></li>
</ul>

The output:

Specifications

Specification Status Comment
HTML Living Standard
The definition of '<sub> and <sup>' in that specification.
Living Standard  
HTML5
The definition of '<sub> and <sup>;' in that specification.
Recommendation  

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support Yes Yes1 Yes Yes Yes
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes Yes4 Yes Yes Yes

See also

  • The <sub> HTML element that produces subscripts. Note that you cannot use them both at the same time and you need to use MathML to produce both a superscript and a subscript next to the chemical symbol of an element, representing its atomic number and its nuclear number.
  • The <msub>, <msup>, and <msubsup> MathML elements.

Document Tags and Contributors

Last updated by: 247flashgames,