Effortlessly convert between pixels and relative units (REM/EM) for responsive web design. Real-time bidirectional conversion with customizable base font size.
The root font size that REM units are based on. Typically 16px in browsers.
Our Pixel to REM/EM Converter is an essential tool for modern web developers and designers who create responsive websites. Unlike fixed pixel units, REM and EM are relative units that scale based on the user's font size preferences, resulting in more accessible and flexible designs.
REM (Root EM) is relative to the root element's font size (usually the <html> tag). This makes REM units predictable and consistent throughout your design.
EM is relative to the font size of its direct parent element. While more contextual, EM units are powerful for creating scalable components where internal proportions need to be maintained.
Key Benefits:
REM units are always relative to the root (HTML) font size, making them consistent throughout your document. EM units are relative to their immediate parent's font size, which can create compounding effects in nested elements.
Relative units like REM and EM allow your design to scale based on user preferences and device characteristics. This improves accessibility and creates more responsive layouts that adapt to different screen sizes and resolutions.
Most modern browsers default to 16px for the root font size. However, users can change this preference, which is why using relative units ensures your design respects their choices.
Yes! Our tool supports bidirectional conversion. Simply enter your EM value and the base font size to calculate the equivalent pixel value. This works for REM conversions as well.
Absolutely! Our Pixel to REM/EM Converter is 100% free with no sign-up required. You can use it as much as you need for both personal and commercial projects.
Enter your root font size in pixels. The default is 16px which is standard in most browsers.
Type in either pixels, REM, or EM value. The other fields will automatically update in real-time.
Click on the converted values to copy them to your clipboard for easy use in your CSS.