Hello there! 😃 Today, we’ll explore how we can calculate the CSS line height property, which defines the height of a line on a webpage. Each line contains the main content (text) as well as the space above and below the content ↕ (line-height). While the default value for desktop browsers is 1.2, we should keep in mind that it can vary depending on the font family. We can also set a custom line-height according to our preferences.

⛔ Please note that the system does not accept negative values. The default value will be automatically used if a negative value is entered.

Below, I have drafted a plan that might help you understand things better. Check it out:

An image depicting a box with the phrase "Hello World", demonstrating the concept of line height in CSS

Below is an example to explain this CSS property more analytically.

HTML structure for CSS line height#

We create an HTML document with four headings <h1> . All headings have the same content (text) but different classes, each with unique characteristics concerning the line-height.

<h1 class="line-height-normal">Hello World</h1>
<h1 class="line-height-1">Hello World</h1>
<h1 class="line-height-2">Hello World</h1>
<h1 class="line-height-negative-value">Hello World</h1>

CSS structure for CSS line height#

We will move forward with our CSS code and add the necessary characteristics. The first heading has a class with line-height: normal, the second one has a class with line-height: 200px, the third one has a class with line-height: 300px, and the fourth has a class with line-height: -300px (⛔ negative value). 

I am using different background-color for each class to easily distinguish them and notice the results clearly. 😉

.line-height-normal {
  background-color: #ffe6cc;
  line-height: normal;
}

.line-height-1 {
  background-color: #ffcc99;
  line-height: 200px;
}

.line-height-2 {
  background-color: #ffb366;
  line-height: 300px;
}

.line-height-negative-value {
  background-color: #E2964A;
  line-height: -300px;
}

In the image that follows, we can see the differences between the four headings regarding their line-height ↕.

Four examples of the content and the CSS line-height property.

Utilizing the line-height CSS property can significantly improve text clarity and visual appeal, creating a comfortable reading experience for users. ✨ 😃

Keep reading#