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CSS calc() Function

❮ CSS Functions Reference

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;
}
Try it Yourself »

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: + - * /

❮ CSS Functions Reference