Percentage to EM Converter

Convert percentage values to EM units based on the parent element's font size. Essential tool for relative sizing in CSS.

Default is typically 16px if no parent font size is set

How Percentage to EM Conversion Works

EM units in CSS are relative to the font size of their parent element. This tool helps you calculate the EM value that corresponds to a percentage of the parent element's font size.

The formula used for conversion is:

emValue = (percentageValue / 100) × parentFontSizeInPixels / parentFontSizeInPixels

Which simplifies to:

emValue = percentageValue / 100

Example: If you have a value of 200% with a parent font size of 16px, the EM value would be:

200% = (200 / 100) × 16px / 16px = 2em

Key Differences Between EM and REM

When to Use EM Units:

Common Use Cases: