How do I convert rem to px?

Multiply the rem value by the root font size. With the default 16px root, 1.5rem × 16 = 24px. The converter does this for you.

Why does my rem value not equal the px I expect?

If the root (html) font size is not 16px — for example set to 62.5% to make 1rem equal 10px — the multiplier changes. Set the correct root font size above.

Is anything uploaded?

No — the conversion runs entirely in your browser and nothing is sent anywhere.

REM to PX Converter

Convert rem units back to pixels for any root font size.

Convert rem to px

To see what a rem value resolves to in pixels, multiply it by the root (html) font size. With the browser default of 16px, 1.5rem × 16 = 24px.

This is handy for debugging layouts, matching design specs, or sanity-checking a spacing scale. Enter your rem value and root font size above and the pixel result updates instantly, all in your browser.