CSS width property

Set the width of three <div> elements

Definition and Usage

The width property sets the width of an element.

The width of an element does not include padding, borders, or margins!

Note: The min-width and max-width properties override the width property.

Default value:	auto
Inherited:	no
Animatable:	yes. Read about animatable Try it
Version:	CSS1
JavaScript syntax:	object.style.width="500px" Try it

The numbers in the table specify the first browser version that fully supports the property.

Property
width	1.0	4.0	1.0	1.0	3.5

width: auto|value|initial|inherit;

Value	Description	Demo
auto	Default value. The browser calculates the width	Demo ❯
length	Defines the width in px, cm, etc. Read about length units	Demo ❯
%	Defines the width in percent of the containing block	Demo ❯
initial	Sets this property to its default value. Read about initial
inherit	Inherits this property from its parent element. Read about inherit

Set the width of an <img> element using a percent value:

img {
width: 50%;
}

Set the width of an <input type="text"> element to 100px. However, when it gets focus, make it 250px wide:

input[type=text] {
width: 100px;
}

input[type=text]:focus {
width: 250px;
}

CSS tutorial: CSS Box model

HTML DOM reference: width property

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