Using relative units like `rem` and `em` is a best practice in modern web development for creating scalable and accessible designs. Our px to rem/em Converter simplifies the math for you. Just set your document's base font size (typically 16px) and enter the pixel value you want to convert.\n\nThe tool instantly provides the equivalent `rem` and `em` values. `rem` units are relative to the root font size, while `em` units are relative to the parent element's font size. This utility is essential for developers who want to build responsive layouts that respect user-defined font size settings.
↔️px to rem/em Converter
Frequently Asked Questions
What is the difference between rem and em?
'rem' (root em) is relative to the font size of the root `<html>` element. This makes it consistent across your entire site. 'em' is relative to the font size of its direct parent element, which can make it tricky as font sizes can compound.
Why is my base font size 16px?
16px is the default font size in most web browsers. It's a common and recommended base for calculations to ensure your site is accessible and scales predictably for users who may have changed their default browser font size.
