EM vs REM in CSS

The different use cases between EM and REM in CSS

The core function of CSS is to enable browsers to style HTML elements. CSS does this by assigning specific values to properties, such as the background, color, font size, margin, padding, and more.

Within CSS, em and rem are both scalable units that also specify values of properties. em and rem meet web accessibility standards, and, unlike px, scale better. Consequently, they are more suited for responsive design.

In this article, we will learn about both the em and rem relative length units. We’ll also go over code examples to demonstrate how they work, their difference, and coding patterns. Lastly, we will learn what problems they solve and when to use each of them.