CSS Unit Converter
Convert between px, rem, em, and other CSS units
px
px
px
1rem
How to Use
- Set the base font size (default: 16px).
- Enter a value and select the from/to units.
- The result is displayed in real time.
FAQ
What is the difference between rem and em?
rem is relative to the root element (html) font size, while em is relative to the parent element's font size.
How do I set the base font size?
You can set it in the base font size input field. The browser default is 16px.