The min-width property is used in CSS and certain HTML elements. This property allows a minimum width to be set for an element box. The calculation for the element's width may be greater than this value, but if the value falls below this value it will recompute the width based on the min-width value. If the value of min-width is greater than the value of max-width, the max-width property value becomes the min-width value. If the calculated value for the width property is less than the min-width value, the calculations are done again using the min-width value as the value for the width property.

Additionally, the browser may have its own minimum allowable width for a specific element type. If the specified min-width is less than this value for an element, the browser default minimum width may be used in its place.


  • inherit - Explicitly sets the value of this property to that of the parent.
  • <length> - Refers to an absolute measurement for the minimum computed element box width. Negative values are not allowed. Examples of lengths are px, em, etc.
  • <percentage> - Refers to a percentage width of the containing element block.

HTML example:

<h1 style="min-width:100px;">
H1 content.

CSS example:

h1 {

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