Web Development

How to Use CSS Math Functions

How to Use CSS Math Functions

If you’re like me, math wasn’t your favorite subject in school. But, believe it or not, math can be fun…and useful! Take CSS math functions, for example. These functions can help you solve all kinds of problems when creating CSS layouts. CSS Math Functions are used to give your HTML page a bit of spice and class. They are really easy to understand, once you get the hang of it. 

The usage of CSS math functions is an important part of a developer belonging to the web development services industry, specifically front-end developers. These functions can help you achieve a variety of interesting designs and animations, but how to use these functions? I will cover the basics of how these functions work in this blog, and describe how I use them in my design process. I have coded a few examples, which will give you a better idea of how these functions can be used to mix things up, a bit!

First, you need to specify the function name, followed by the arguments you want to use. The arguments can be any valid CSS values, including lengths, percentages, or numbers. Next, you need to specify what you want the function to return. The return value can be either a length, a percentage, or a number.

Finally, you can use the function anywhere you would use a CSS value. For example, you could use it to set the width of an element, or to calculate the margin-top for a heading.

Reasons to Use CSS Variables

There are many reasons to use CSS variables, but here are five of the most important ones:

  • CSS variables are more flexible than traditional CSS.
  • CSS variables are easier to maintain and update.
  • CSS variables can be used across multiple files and pages.
  • CSS variables are easier to understand and debug.
  • CSS variables can improve performance.

How to Use calc() function

Let’s have a look at some examples to see how CSS math functions can be used in practice.

Example 1: Calculate the Width of an Element

Let’s say you have an element that you want to be 80% of the width of the viewport. You could use the calc() function to calculate the width like this:

.element {

 Width: calc(80vw – 40px); }

In this example, the calc() function will take the width of the viewport (80vw) and subtract 40px. The result will be the width of the element.

Example 2: Calculate the Margin-Top for a Heading

Now let’s say you have a heading that you want to be 10px taller than the element that comes before it. You could use the calc() function to calculate the margin-top like this:

.heading {

 Margin-top: calc(10px + .5em); }

In this example, the calc() function will take the 10px and add .5em. The result will be the margin-top for the heading.

Example 3: Decrease the Size of an Image

For instance, you have an image that you want to be 50% smaller than its original size. You could use the calc() function to calculate the width like this:

.image {

 Width: calc(100% – 50%); }

In this example, the calc() function will take the original width of the image (100%) and subtract 50%. The result will be the new width of the image.

When using the calc() function, you can use variables without the var prefix as long as they are declared before the calc rule. The calc() function is a very powerful function. It can do a lot more than just simple math. You can also use it to do some pretty cool things with colors and animations.

Practical Purpose of min() Function

source: https://codepen.io/una/pen/rNeGNVL

The min() function is a built-in function in PHP that returns the smallest of a given list of values. It is often used to set the smallest acceptable value for a given variable.

For example, let’s say you have a variable $num that you want to set to the minimum integer that is bigger than or equal to 5. You can use the min() function like this:

$num = min(5, 10, 15, 20);

The variable $num will now be set to 5.

You can also use the min() function to find the smallest value in an array. For instance, let’s say you have an array of integers and you want to find the smallest one. You can use the min() function like this:

$numbers = array(5, 10, 15, 20);

$min = min($numbers);

The variable $min will now be set to 5.

The min() function is a useful tool for setting variables to the smallest acceptable value. It can also be used to find the smallest value in an array.

Practical Purpose of max() Function

The practical purpose of the max() function is to set a boundary on the lowest allowed value that could possibly be experienced given the responsive context of an element. The max() function is basically used to get the maximum value of a given CSS property from a comma-separated list of values.


#div1 {

  Background-color: black;

  Height: 50px;

  Width: max(40%, 200px);


Clamp() Function

The clamp() function wraps a value specified inside parentheses, between an upper and lower limit based on an established ideal value, also written with in parentheses. Any excess content will be truncated due to the limitations it imposes. The order of what is inside the parenthesis, however, can make a difference; whether you put your values in ascending or descending order may affect the outcome of what you expect. 

In other words, the clamp() function is used to limit a value to a given range. The function takes three parameters: the value to be limited, the minimum value, and the maximum value. The function returns the limited value.

For example:

min: the minimum value

: the minimum value : the value to limit

: the value to limit max: the maximum value

The clamp function will return the min value if the value is less than min, the max value if the value is greater than max, and the value if it is between min and max. For example:

clamp(10, 5, 15) // returns 10 clamp(15, 5, 15) // returns 15 clamp(20, 5, 15) // returns 15

The Filter Function

Filter() function applies a set of graphical modifications to the presence of an input image and elements. So far, I have tested which effects the following properties can achieve: (brightness, blur, contrast, hue-rotate, grayscale, opacity, invert, and sepia). Though there are more if I’m not mistaken.

Here is an example:


#myImg { 

  filter: drop-shadow(8px 8px 10px gray);


Whether you’re planning on learning Laravel 9.2 or seeking assistance to learn different programming languages, CSS math functions can be very handy for solving all kinds of problems. So next time you’re stuck, reach for the calc() function and see if it can help you out!

Sum Up

The CSS math functions are very useful, powerful, and easy to implement in your web pages or web applications. Now that you have been introduced to these responsive mathematical operators in practical examples, all you need to do is make use of them to build an intuitive UI for your customers.

Related posts
Web Development

The First Things You Need To Know About Web Development

Web Development

Why Website Is So Important For Everyone Who Wishes To Sell In 2022

Web Development

What's the Difference Between a Web Designer and a Website Developer?

Web Development

Tips and Tricks for Responsive Yet Minimalist Website Design

Sign up for our Newsletter and
stay informed

Leave a Reply

Your email address will not be published.