HTML <sub> Tag


Subscript text:

<p>This text contains <sub>subscript</sub> text.</p>

Try it Yourself »

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

<sub> Yes Yes Yes Yes Yes

Differences Between HTML 4.01 and HTML5


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:


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

Try it Yourself »

Color Picker