Convert REM units back to pixel dimensions with customizable root font sizes (16px default) for CSS layout development.
While CSS is best authored with responsive REM units, design mockups in Figma or Sketch often require exact pixel references.
This tool lets you quickly check the computed pixel dimension for any REM value based on your project's base typography size.
PX = REM * Base Font Size. With a standard 16px root font size, 2.25rem = 2.25 * 16 = 36px.
Convert PX to REM and REM to PX in real-time with customizable base font size (16px default) and comprehensive typography reference tables.
Generate fluid, responsive font sizes and spacing that scale smoothly across mobile and desktop screens without media query breakpoints.
Calculate matching dimensions, aspect ratio fractions, and CSS aspect-ratio properties with instant presets for popular device resolutions.
Design multi-layered CSS box shadows visually with real-time preview, opacity sliders, blur spread controls, and 1-click CSS code export.