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Percent to EM Converter

Convert CSS percentages into EM units for responsive and scalable text styling.

%
em
Base size (1em / 100%)
Sample Text
Converted size (1em / 100%)
Sample Text
.element { font-size: 1em; /* 100% */ }

EM = Percentage / 100

Example: 100% / 100 = 1em

Reference Table

Percentage (%)EM ValueCommon Use
50%0.50emSmaller than parent element
75%0.75emSmaller than parent element
80%0.80emSmaller than parent element
90%0.90emSmaller than parent element
100%1.00emSame as parent element
110%1.10emSlightly larger than parent
125%1.25emSlightly larger than parent
150%1.50emSlightly larger than parent
175%1.75emMuch larger than parent
200%2.00emMuch larger than parent
250%2.50emMuch larger than parent
300%3.00emMuch larger than parent
About Percent to EM Converter

The Percent to EM converter is a tool that helps web developers and designers convert percentage values to EM units for responsive web design. This conversion is particularly useful for creating scalable typography and layouts.

What are Percentages (%)? Percentages are relative units that are calculated based on the parent element's size. For example, if a parent element has a font-size of 16px, then 100% would be 16px.

What are EM Units? EM is a relative unit of measurement in CSS that is based on the font size of the parent element. 1em equals the font size of the parent element. If the parent element's font size is 16px, then 1em = 16px, 2em = 32px, and so on.

Why Convert Percentages to EM? Converting from percentages to EM units is useful when:

  • Creating responsive typography that scales with parent elements
  • Building component-based designs where elements need to scale relative to their containers
  • Implementing designs that require proportional scaling of elements
  • Creating accessible designs that respect user font size preferences

How to Use This Converter:

  1. Enter the percentage value you want to convert
  2. The converter will calculate the equivalent EM value
  3. You can use the slider to adjust the percentage value and see real-time updates
  4. For multiple conversions, use the Batch Conversion tab

Formula: EM = Percentage / 100

Remember that EM units are relative to the parent element's font size. This means that EM values can compound when nested elements all use EM units. This can be both powerful for creating scalable designs and challenging to manage in complex layouts.