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1440px

4rem to px

4rem is 64px at the default 16px root font size.

4rem in px · 16px root
64 px

px = rem × root font size — shown here at the browser default root font size of 16px.

4rem at every root font size

4rem converted at each common root font size
Root font size4rem equalsCSS
10px40pxfont-size: 40px;
12px48pxfont-size: 48px;
14px56pxfont-size: 56px;
16px default64pxfont-size: 64px;
18px72pxfont-size: 72px;
20px80pxfont-size: 80px;

Converter

Nearby values

rempx
2.5rem40px
2.75rem44px
3rem48px
3.5rem56px
4rem64pxthis page
4.5rem72px
5rem80px
6rem96px
7rem112px

Questions

What is 4rem in px?

4rem = 64px at the browser default root font size of 16px. px = rem × root font size.

What is 4rem in px at a different root size?

At 10px root: 40px. At 12px root: 48px. At 14px root: 56px. At 16px root: 64px. At 18px root: 72px. At 20px root: 80px.

How is 4rem calculated?

px = rem × root font size. Here: 4 × 16 = 64.

All rem values

Computed from the CSS Values and Units specification. See the full rem to px table.