EM to Viewport Width Converter

Convert EM to viewport width (VW), suitable for responsive web design

What are EM and Viewport Width?

EM is a relative unit based on the font size of the parent element. Viewport width (VW) is a percentage unit relative to the viewport width, where 1 VW equals 1% of the viewport width.

Usage Instructions

  1. Set the parent element's font size (default is 16px)
  2. Input the EM value to convert
  3. Click the "Convert" button or press Enter to get the result
  4. Use the "Copy" button to copy the conversion result
px
em
0 vw

Calculation formula: vw = (em × parent element font size) ÷ (viewport width) × 100

Common conversion examples

  • 1em = 6.25vw (when the parent element's font size is 16px and the viewport width is 100px)
  • 2em = 12.5vw
  • 0.5em = 3.125vw
  • 1.5em = 9.375vw