Developer utility
CSS Unit Converter
Convert CSS lengths using configurable root, parent, and viewport dimensions.
px
16px
rem
1rem
em
1em
%
100%
vw
1.1111vw
vh
1.7778vh
About CSS Unit Converter
Convert CSS lengths between px, rem, em, percentages, vw, and vh with adjustable reference values. No account is required, and your input remains on your device.
How to use CSS Unit Converter
- 01Enter or select the content you want to process.
- 02Choose the settings that match your intended output.
- 03Copy or download the result when it is ready.
Example
Input
16px at 16px root
Result
1rem
Frequently asked questions
Is CSS Unit Converter free?
Yes. You can use this tool without creating an account or paying for access.
Is my data uploaded?
No. Tool input is processed locally in your browser and is not sent to AlifBay servers.