20px = 1.25rem

CSS Example

/* 20px as rem */
.element {
  font-size: 1.25rem; /* 20px */
}

When to Use 20px (1.25rem)

A value of 20px (1.25rem) is commonly used for slightly larger body text, lead paragraphs, and emphasized content. In responsive web design, using 1.25rem instead of 20px ensures your lead text and subheadings scale proportionally when users change their browser font size settings.

Why Use REM?

REM units are relative to the root element's font-size, making them ideal for accessible, responsive designs. When you write 1.25rem instead of 20px, your layout respects user preferences — if someone sets their browser to a larger font size for readability, all your rem-based values scale up proportionally.