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CSS Math Functions


The CSS math functions allow mathematical expressions to be
used as property values. Here, we will explain the calc(),
max() and min() functions.

The calc() Function
The calc() function performs a calculation to be used as the property value.
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: + - * /


Let us look at an example:

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;}

Try it Yourself »



The max() Function
The max() function uses the largest value,
from a comma-separated list of values, as the property value.
CSS Syntax

max(value1, value2, ...)



Value
Description


value1, value2, ...
Required. A list of comma-separated values - where the largest value is
chosen


Let us look at an example:

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

#div1 {  background-color: yellow;  height: 100px; 
width: max(50%, 300px);}

Try it Yourself »









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

min(value1, value2, ...)



Value
Description


value1, value2, ...
Required. A list of comma-separated values - where the smallest value is
chosen


Let us look at an example:

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

#div1 {  background-color: yellow;  height: 100px; 
width: min(50%, 300px);}

Try it Yourself »



All CSS Math Functions


Function
Description


calc()
Allows you to perform calculations to determine CSS property values


max()
Uses the largest value, from a comma-separated list of values, as the
property value


min()
Uses the smallest value, from a comma-separated list of values, as the
property value














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Reference: https://www.w3schools.com/css/css_math_functions.asp