CSS font-width Property Reference

The CSS font-width property is a experimental property in CSS Fonts. Review its formal syntax, computed behavior, and practical declarations.

Updated 2026-08-12

font-width overview

The CSS font-width property is a experimental property in CSS Fonts. Review its formal syntax, computed behavior, and practical declarations.

The computed value normally inherits from the parent element when no declaration wins the cascade.

Syntax and formal definition

font-width formal syntax

Field	Value
Formal syntax	normal \| <percentage [0,∞]> \| ultra-condensed \| extra-condensed \| condensed \| semi-condensed \| semi-expanded \| expanded \| extra-expanded \| ultra-expanded
Initial value	normal
Applies to	allElementsAndText
Inherited	Yes
Percentages	no
Computed value	percentage
Animation type	byComputedValueType
Media	visual
Specification group	CSS Fonts
Status	Experimental

Practical examples

These declarations demonstrate valid ways to set font-width. The initial and inherit global keywords remain available even when a property-specific value is preferable.

font-width live example

CSS

.reset-example {
  font-width: initial;
}

.inherit-example {
  font-width: inherit;
}

@supports (font-width: initial) {
  .supported {
    font-width: initial;
  }
}