PX to EM & EM to PX Converter
Convert between pixels (PX) and em units with ease. Customize your base font size (default is 16px) to get accurate values for responsive web design.
What is PX and EM?
PX (pixels) is an absolute unit, while EM is a relative unit in CSS based on the font size of the parent element. Converting PX to EM helps create scalable and responsive designs.
EM units are relative to the font size of the current element’s parent. Unlike REM, which is based on the root, EM provides local control — making it ideal for component-level styles and nested element sizing.
When choosing between px, rem, and em, EM units provide a powerful way to scale components relative to their context. This helps build responsive and accessible designs.
PX to EM Formula:
EM = PX / Base Font Size
EM to PX Formula:
PX = EM × Base Font Size
Why Use EM Instead of PX?
- EM units scale based on the parent element’s font size, enabling more flexible layouts
- Great for creating modular, nested components with proportional sizing
- Improves accessibility by respecting user preferences and scaling behavior
- Works well for spacing, padding, and font sizes within reusable components