Pixels to REM Converter
Enter a value above to convert.
Quick reference (base 16px)
Convert pixel values to REM units — or REM back to pixels — instantly. Set a custom base font size (default 16px) and use the quick reference table to convert common values. Essential for responsive web design and CSS development. Free, no signup required.
Three steps. No setup.
Drop your content into the field above, or type directly into it. The tool starts working the moment you do — no button to press.
Everything is calculated locally in your browser as you type. No waiting, no uploading, no server involved.
Hit Copy to grab the result, or Download if the tool offers a file. Close the tab — nothing is stored.
Free, private, and built to last.
Pixels to REM Converter is a free online tool that runs entirely in your browser. No data is sent to any server — your input stays private on your device and disappears the moment you close the tab.
It is designed to be fast, simple, and accessible to everyone — whether you are a developer, marketer, student, or business owner. No signup, no ads, no nonsense. Just the tool, ready when you need it.
Frequently Asked Questions
Divide the pixel value by the base font size (usually 16px). So 24px ÷ 16 = 1.5rem. This tool does the calculation automatically — enter your px value and the rem equivalent appears instantly.
16px equals 1rem when the base font size is 16px (the browser default). 8px = 0.5rem, 24px = 1.5rem, 32px = 2rem. Use the quick reference table in this tool for the most common conversions.
REM units scale relative to the root font size, which makes your design responsive to user accessibility settings. If a user increases their browser font size, rem-based layouts scale correctly, while px-based layouts stay fixed.
REM = PX ÷ Base Font Size. With the default base of 16px: 1rem = 16px, 2rem = 32px, 0.5rem = 8px. If you change the base size, the calculation updates accordingly.
Yes. Switch to rem → px mode using the toggle on the tool, enter your rem value, and the pixel equivalent appears instantly. The same base font size setting applies to both directions.