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HTML <sub> Tag

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Example

Subscript text:

<p>This text contains <sub>subscript</sub> text.</p>
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Definition and Usage

The <sub> tag defines subscript text. Subscript text appears half a character below the normal line, and is sometimes rendered in a smaller font. Subscript text can be used for chemical formulas, like H2O.

Tip: Use the <sup> tag to define superscripted text.

Browser Support

Element
<sub> Yes Yes Yes Yes Yes

Global Attributes

The <sub> tag also supports the Global Attributes in HTML.

Event Attributes

The <sub> tag also supports the Event Attributes in HTML.

Related Pages

HTML tutorial: HTML Text Formatting

HTML DOM reference: Subscript Object

Default CSS Settings

Most browsers will display the <sub> element with the following default values:

Example

sub {
  vertical-align: sub;
  font-size: smaller;
}
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