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EM to Percent Converter

Convert EM values to CSS percent. For font-size, EM and percent are equivalent: 1em = 100%, 1.5em = 150%, 0.75em = 75%.

Last updated: May 21, 2026

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What is EM to Percent Converter?

For the `font-size` property, CSS `em` and `%` are interchangeable — both are relative to the parent element's font size. 1em = 100%, 0.5em = 50%, 2em = 200%.

The conversion is a simple multiplication: **% = em × 100**. For other CSS properties like padding or margin, em and % behave differently (em scales with the element's font size, while % scales with the parent's dimension), but this tool handles the direct numerical conversion.

How to Use EM to Percent Converter

1

Enter one or more EM values (comma or newline separated)

2

Copy the percent output or use the reference table

3

The formula is always: % = em × 100

Common Use Cases

  • Developers switching font-size declarations between em and percent.
  • Front-end engineers checking the percent equivalent of an em type scale.
  • Students learning that em and percent are numerically equivalent for font-size.
  • Teams auditing stylesheets to standardise on one relative unit.

Example Input and Output

Convert common EM font sizes to their percentage equivalents.

EM values
0.75
1
1.25
1.5
Percent output
0.75em → 75%
1em → 100%
1.25em → 125%
1.5em → 150%

Privacy

All conversions run in your browser. No data is sent to any server.

Frequently Asked Questions

Is em always equal to percent?

For font-size: yes, 1em = 100% always. For other properties, the relationship differs — em is relative to the element's font size, while % is relative to the parent's corresponding dimension.

Which should I use — em or percent?

Both work for font-size. em is more common in modern CSS, while percent was popular in older codebases. Pick one and be consistent.

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