CSS: Percentage Value

By Xah Lee. Date: . Last updated: .

% is percentage.

Example:

div {width: 5%}

Percentage is not technically considered a “length unit”.

Meaning of percent value is dependent on the specific property.

css percentage K4p46
CSS 2.1 spec, 4.3.3 Percentages

〔see HTML: the Root Element〕

💡 TIP: don't use percentage value, because its meanings is complex. Use vw, vh, vmin, vmax instead.

CSS Basics