CSS Unit Converter
A tool to convert between CSS units like px, rem, em, %, vw, and vh.
Enter a value in any unit field and the other units will be calculated automatically. Set the base font size (default: 16px) and viewport dimensions for accurate rem/em and vw/vh conversions. The conversion is performed in real-time.
CSS
CSS supports various units for specifying lengths. Absolute units like px have a fixed size, while relative units like rem, em, %, vw, and vh are calculated relative to another value. rem is relative to the root font size, em is relative to the parent's font size, % is relative to the parent element, and vw/vh are relative to the viewport dimensions. Using relative units is recommended for responsive design.
About CSS Units
Q. What is the difference between rem and em?
A. rem is relative to the root element's (html) font size, while em is relative to the parent element's font size. rem provides more predictable sizing across nested elements.
Q. Is my input data secure?
A. All processing is completed within your browser. No data is ever sent to any server.
Q. ？
A.