REM to EM Converter

Convert rem units to em units instantly for responsive web design

About REM to EM Conversion

REM (Root EM) and EM are both relative CSS units, but they scale differently. REM is relative to the root (html) element's font size, while EM is relative to its parent element's font size.

How to Use This Tool

  1. Enter the REM value you want to convert
  2. Specify the parent element's font size in pixels
  3. Specify the root element's font size in pixels
  4. Click "Convert to EM" to get the equivalent EM value
  5. Copy the result and use it in your CSS

The Conversion Formula

The formula to convert REM to EM is:

em = (rem × root-font-size) / parent-font-size

For example, to convert 1.5rem to em when root is 16px and parent is 14px:

(1.5 × 16) / 14 = 1.714em

Why Convert Between REM and EM?

Key Differences Between REM and EM

Best Practices