em is relative to the parent element's font size. rem is relative to the root (html) element. Use rem for more predictable sizing.
Convert Pixels to EM
Convert pixels to EM units for scalable, accessible CSS. Unlike REM which uses root font size, EM is relative to parent element font size. Our converter lets you set the parent size for accurate calculations.
How to Use This Calculator
- Enter pixel value
- Set parent font size
- View EM equivalent
- Copy CSS values
Features
- PX to EM conversion
- Custom parent font size
- Reference table
- CSS output
Frequently Asked Questions
Is this PX to EM Converter free to use?
Yes, our PX to EM Converter is completely free to use with no registration or signup required. Use it as many times as you need.
How accurate is the PX to EM Converter?
Our calculator uses standard mathematical formulas and provides accurate results. For critical financial or health decisions, always consult with a qualified professional.
Does this tool work on mobile devices?
Yes, this tool is fully responsive and works on all devices including smartphones, tablets, and desktop computers.