PX to EM

PX (pixels) is a fixed-size unit, while em is a relative unit that scales based on the root element's font size. 1 em equals the font size of the html element (typically 16px by default). em units are preferred for responsive design as they scale with user preferences.

Converting PX to em offers several benefits: better accessibility, responsive design, consistent scaling across devices, and respect for user font size preferences. em units make it easier to maintain and scale your website's typography and layouts.

To convert PX to em, divide the pixel value by the base font size (usually 16px). For example: 32px ÷ 16px = 2em. Our converter tool automates this calculation for you and even shows you the closest Tailwind CSS preset.

The default base size is 16 pixels, which means 1em = 16px. However, you can customize this base size in our converter tool by clicking 'Show base font size settings' if your project uses a different root font size.

Yes, em units have excellent browser support and work in all modern browsers. They've been supported since Internet Explorer 9, making them safe to use in production websites.

While em is excellent for font sizes and spacing related to typography (margins, padding), you might want to use pixels for borders or very small details. For responsive layouts, you might also consider using percentage or viewport units (vw/vh).

While both em and rem are relative units, they have a key difference: em units are relative to their parent element's font size, while rem (root em) units are always relative to the root element's font size (usually the html element). This makes rem more predictable for maintaining consistent spacing, as em units can compound when nested elements inherit font sizes.