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HTML <sub> tag

The <sub> tag is used to define subscript text. Subscript texts are normally rendered with lowered baseline and smaller text like 2 in H2O.

Type: Inline Element

Syntax of <sub> tag

<sub>Subscript text</sub>

Supported Browsers

Tag Chrome Internet Explorer Firefox Safari Opera Mini
<sub> Yes Yes Yes Yes Yes

Full code example

<!DOCTYPE html>
<html>
<head>
</head>
<body>
<p>
 The chemical formala of water is H<sub>2</sub>O
</p>
</body>
</html>
Run The code »

Output on the browser

The chemical formala of water is H2O

More reference

<sub> tag is mainly used in writing chemical formulas and mathematical variables.

Default CSS properties of <sub> tag

sub {
  font-size:smaller;
  vertical align:sub; or vertical align:-25%;
}
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