Pixel sizes are absolute and rem sizes follow the root font size, which means a user who bumps their browser’s text size gets a whole interface that scales along. That choice is what separates accessible layouts from the rest.
Convert px to rem or em at any root size, plus a full spacing table for the common values. Size spacing and type in rem, keep px only for the elements that must never scale, and the layout survives user settings.
Try it now: open the free tool, runs 100{ddff9936f8333f09603555df7bd6492034f3a4a35de784276d3cf3d66166a113} in your browser.
Bottom line: size in rem so browser zoom scales the interface.
Your turn: use the tool free here, no signup, nothing leaves your device.
How do you use PX to REM/EM Converter?
Open the PX to REM/EM Converter in your browser (CSS unit conversion). Type or paste your input, adjust the options, and copy the result. Everything runs locally on your device with no account and nothing stored, so the three steps below take seconds even for confidential work.
- Paste or type the value you want converted into the input box.
- Pick the units or format you are converting between.
- Read the converted result and copy it with the copy button.
Try PX to REM/EM Converter free. It opens right in your browser.