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Convert 24px to REM

Convert px to rem, rem to px and px to em at any base font size, with a copy-ready CSS line and a live reference table.

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Result

This page opens the converter with 24 already entered: at the default 16px base font size, 24px is exactly 1.5rem, because 24 divided by 16 is 1.5. The CSS line font-size: 1.5rem; is ready to copy the moment the page loads.

Twenty-four pixels is a workhorse size — a typical h3 or large-body font size, a standard icon dimension and one of the most used spacing steps in 8-point grids. Its clean 1.5rem value at the default base makes it a favourite anchor when converting a pixel design to rem units.

If your root font size differs, type the real base — at a 10px root the same 24px becomes 2.4rem — and consult the reference table below for the neighbouring sizes 20, 32 and 48 px converted at the same time. All of it runs live in your browser.

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Executed in Browser

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Accepted Formats & Rules

  • Three directions in one selector: px → rem, rem → px and px → em.
  • Adjustable base font size (16px by default) applied to the result and every table row.
  • Reference table for common sizes from 1 to 64 px, recalculated for the current base with the base row highlighted.

Key Benefits

✓ The converted value, the CSS line and the reference table update live as you type — no button to press.
✓ The base font size is adjustable, so 10px-base projects and custom typographic scales work just as well as the 16px default.
✓ Runs entirely in your browser: nothing is uploaded, and the copy-ready CSS line is one click away.

Use Cases

  • • Turn a pixel value from a design mockup into the rem the stylesheet needs.
  • • Convert rem values from someone else's CSS back into pixels to match a spec.
  • • Rework a whole typographic scale after switching to the 10px (62.5%) root font size.