Superscript Three ³

The Superscript Three character (³) is a standard HTML entity defined in the HTML specification. In HTML source code, it can be written using the named entity reference ³, the decimal numeric character reference ³, or the hexadecimal numeric reference ³. The character is assigned Unicode code point U+00B3 in the Universal Character Set.

The superscript three represents cubed values and is used in volume measurements, polynomial expressions, and physics formulas. Like superscript two, it is a precomposed character that renders in a raised position without requiring the <sup> element or CSS styling.

Mathematical HTML entities enable web authors to display proper mathematical notation without relying on images or specialized rendering libraries like MathJax or KaTeX. While complex equations and multi-line formulas may still benefit from dedicated math typesetting tools, individual symbols expressed as HTML entities render quickly, remain accessible to screen readers, and can be styled with CSS just like regular text content.

When deciding how to encode the Superscript Three character in your HTML documents, the named entity &sup3; is generally the most readable choice for developers reviewing or maintaining source code. The decimal form &#179; and hexadecimal form &#xB3; are equally valid alternatives that work in contexts where named entities may not be supported, or when generating HTML output programmatically from server-side code. All three representations produce identical visual output in every modern web browser.

Use the superscript three for volume measurements (m³, cm³), cubic expressions in mathematics (x³), and physics notation for volume-related quantities. It pairs well with &sup2; in polynomial expressions and provides consistent typographic rendering across browsers and platforms.