64px to rem = 4rem
64 pixels equals 4rem at the default root font size of 16px. Adjust the root size below to recalculate.
What’s 64px used for?
64px (4rem) is a display-size value — used for hero headlines, large marketing display type, and oversized section spacing. As type it's larger than most body-prose use cases call for; reserve for landing pages, hero sections, and page titles where impact matters more than readability. Tailwind's text-6xl and spacing-16 land here.
How it works
To convert 64px to rem, divide by the root font size: 64 / 16 = 4. The rem unit is relative to the root element’s font size, which browsers default to 16px.
64px to rem at different root sizes
If you’ve overridden the html root font size, the rem equivalent of 64px shifts. Here’s 64px at common root sizes.
| Root size | 64px in rem |
|---|---|
| 16px (default) | 4rem |
| 12px | 5.3333rem |
| 14px | 4.5714rem |
| 18px | 3.5556rem |
| 20px | 3.2rem |
| 24px | 2.6667rem |
64px in CSS
Use 64px as generous section padding on a landing-page block.
.section {
padding-block: 64px; /* 4rem */
}FAQ
Is 64px the same as 4rem?
Yes, at the browser default root font size of 16px. If the root has been changed (some sites use html { font-size: 62.5% } or similar), the conversion changes — see the table above for 64px at other root sizes.
Will 64px scale with user font preferences?
No. Pixel values are absolute and ignore the user’s browser font-size preference. If you want 64px to scale when users enlarge their default font size, use 4rem instead — same visual size at the default root, but it grows or shrinks with the user’s setting.