Tools / Pixels to Ems Conversion

Pixels to Ems Conversion

Convert between pixels and ems using your base font size. Essential for responsive, accessible CSS typography.

em and rem share the same maths here. em resolves against the nearest parent font size, rem against the document root, so they match whenever the parent is the root.

Common sizes

pxEms / Rems
100.625
120.75
140.875
161
181.125
201.25
241.5
301.875
322
362.25
483
644

Frequently asked questions

Why use em instead of px?

Ems scale relative to the parent font size, making layouts more flexible and accessible when users change browser text size.

What is the base font size?

Browsers default to 16px. Enter your project's base size to get accurate em conversions.

Can I convert em back to pixels?

Yes. Enter either value and the tool calculates the equivalent in the other unit.

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