CSS Unit Converter
Convert between CSS units: px, rem, em, pt, vw, vh. Set your base font size for accurate conversions.
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About CSS Units
CSS supports absolute units (px, pt) and relative units (rem, em, vw, vh, %). rem is relative to the root font size (usually 16px). em is relative to the parent element. vw/vh are 1% of viewport width/height. Using rem ensures consistent scaling across your design.