How do I convert pixels to ems?

Divide the pixel value by the base font size in pixels. For example, with a 16px base, 16px equals 1em, and 8px equals 0.5em.

Can I use this converter for responsive design?

Yes, converting px to em helps create scalable typography that adjusts when users change their browser font size, improving accessibility across devices.

What is the difference between em and rem?

Em is relative to the font size of its parent element, while rem is relative only to the root element's font size, making rem more predictable for global styles.

Do I need to set a base font size every time I convert?

Not necessarily. Some tools like CodeBeautify default to a 16px base and convert instantly, while others like Omni Calculator require you to input a base size for accurate project-specific results.

Why would I convert px to pt?

Points are traditionally used in print design (1pt = 1/72 inch). Converting px to pt is useful when preparing web assets for print or working in design software that defaults to points.

General Conversion2 options compared

PX to EM Converter

Web developers and designers often need to translate static pixel values into scalable units to ensure typography remains responsive across various devices. The PX to EM Converter simplifies this process by providing instant calculations between the most common CSS font-size units, including pixels, ems, points, and percentages. By allowing users to define a custom base font size, it ensures that...

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Editors’ Top PickBased on community votes

CodeBeautify

codebeautify.org

PX to EM Converter

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Omni Calculator
omnicalculator.com
Use our px to em converter to quickly switch between the four most popular CSS font-size units: px, em, pt, and perce...
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Side by side

PX to EM Converter options compared

Tool	Best for	Strengths	Limitations
CodeBeautify codebeautify.org	Quick px to em conversion	Instant conversion without base size input Includes preview of common CSS units (rem, percent, pt) alongside em values	No option to set a custom base font size Conversion table limited to preset values
Omni Calculator omnicalculator.com	Learning CSS unit relationships	Explains px, em, pt, and percent relationships in detail Allows setting a custom base font size for project-specific conversions	Requires base size input to function More text-heavy interface compared to CodeBeautify

Buyer's guide

How to choose a px to em converter

If you already know your base font size and just need to convert a handful of pixel values to ems, CodeBeautify's tool is faster because it skips the base size setup and gives you a side-by-side preview of rem, percent, and pt equivalents. If you are trying to understand how the units relate or need to adjust the base font size to match a specific project's typography, Omni Calculator's explanations and base size selector make the math transparent and adjustable.

Questions

PX to EM Converter FAQ

How do I convert pixels to ems?: Divide the pixel value by the base font size in pixels. For example, with a 16px base, 16px equals 1em, and 8px equals 0.5em.
Can I use this converter for responsive design?: Yes, converting px to em helps create scalable typography that adjusts when users change their browser font size, improving accessibility across devices.
What is the difference between em and rem?: Em is relative to the font size of its parent element, while rem is relative only to the root element's font size, making rem more predictable for global styles.
Do I need to set a base font size every time I convert?: Not necessarily. Some tools like CodeBeautify default to a 16px base and convert instantly, while others like Omni Calculator require you to input a base size for accurate project-specific results.
Why would I convert px to pt?: Points are traditionally used in print design (1pt = 1/72 inch). Converting px to pt is useful when preparing web assets for print or working in design software that defaults to points.

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