CSS calc() Function

Example

Use calc() to calculate the width of a <div> element:

#div1 {
position: absolute;
left: 50px;
width: calc(100% - 100px);
border: 1px solid black;
background-color: yellow;
padding: 5px;
text-align: center;
}

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Definition and Usage

The calc() function performs a calculation to be used as the property value.

Version:	CSS3

Browser Support

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

Numbers followed by -webkit-, -moz-, or -o- specify the first version that worked with a prefix.

Function
calc()	26.0 19.0 -webkit-	9.0	16.0 4.0 -moz-	7.0 6.0 -webkit-	15.0

CSS Syntax

calc(expression)

Value	Description
expression	Required. A mathematical expression. The result will be used as the value. The following operators can be used: + - * /

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