CSS Math Functions

CSS Tutorial


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CSS Advanced


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CSS Responsive

CSS Grid

CSS Math Functions

The CSS math functions enable mathematical expressions to be used as property values. The calc(), max() and min() functions are included.

The calc() Function

The calc() function is used as the property value to perform calculations.

CSS Syntax

calc(expression)

HTML
				
					<h1>The calc() Function</h1>
<p>Create a div that stretches across the window, with a 50px gap between both sides of the div and the edges of the window:</p>
<div id="div1">Some text...</div>

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

				
			

Output

calc function

The max() Function

The max() function makes use of the largest value, from a comma-separated list of values, as the property value.

CSS Syntax

max(value1, value2, …)

HTML

Using the max() to set the width of #div1 to whichever value is largest, 50% or 300px.

				
					<h1>The max() Function</h1>

<p>Use max() to set the width of #div1 to whichever value is largest, 50% or 300px:</p>
<div id="div1">Some text...</div>
<p>Resize the browser window to see the effect.</p>
				
			
CSS
				
					#div1 {
  background-color: pink;
  height: 100px;
  width: max(50%, 300px);
}
				
			

Output

The min() Function

The min() function specifies the smallest value, from a comma-separated list of values, as the property value.

CSS Syntax

min(value1, value2, …)

HTML

Use min() to set the width of #div1 to whichever value is smallest, 50% or 300px.

				
					<h1>The min() Function</h1>
<p>Use min() to set the width of #div1 to whichever value is smallest, 50% or 300px:</p>
<div id="div1">Some text...</div>
<p>Resize the browser window to see the effect.</p>
				
			
CSS
				
					#div1 {
  background-color: pink;
  height: 100px;
  width: min(50%, 300px);
}
				
			

Output

css min

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