What is PX to REM Converter?
A PX to REM converter is a tool or utility used to convert pixel (PX) units to root em (REM) units in web design and development. Both PX and REM are commonly used to define the size of elements on web pages, but they serve different purposes:
PX (Pixels):
- Pixels are an absolute unit of measurement that define a fixed size.
- 1 pixel corresponds to one dot on a display screen and does not scale based on any other element’s size.
- Using pixels provides precise control over element sizes, but it lacks scalability for responsive design.
REM (Root EM):
- REM stands for “root em” and is a relative unit of measurement based on the font size of the root element (
<html>element). - By default, if the root font size is set to 16px (the browser default), 1 REM equals 16 pixels.
- REM units allow for better responsiveness and scalability, as adjusting the root font size will scale all REM-based elements proportionally.
Conversion Formula:
- The formula to convert pixels to REM is:
REM = PX / Root Font Size. - For example, if the root font size is 16px, 32px would be converted to 2 REM (
32px / 16px = 2rem).