Update README.md

Added CSS Unit Converter tools that help convert pixels to rem, em, pt and other units.

Author: TheHotshotNerd

README.md

@@ -272,6 +272,8 @@ Here is a [CSS in JS techniques comparison](https://github.com/MicheleBertoli/cs
 * [Single Div Project](https://github.com/ManrajGrover/SingleDivProject) - One `<div>`. Many possibilities.
 * [You Might Not Need JS](http://youmightnotneedjs.com/) - CSS alternatives for common JS UI components.
 * [Xpath-to-selector](https://github.com/steambap/xpath-to-selector) - Convert xpath to css selector.
+* [CSS Unit Converter](https://cssunitconverter.com/) – A simple pixel converter tool to convert pixels to REM, EM, PT, Inches, CM, and more for web design & other forms of designing.
+
 
 <sub>[⇧ back to top](#contents)</sub>