PX to REM for Web Development
Convert pixel values to rem units for scalable, accessible CSS. Set your base font size and instantly see all equivalent values.
Context (affects rem/em/vw/vh/%)
Common pixel sizes β rem (at 16px base)
Web Dev tips
REM units scale with the user's browser font size setting. Using rem instead of px makes your site accessible to users who set larger default text sizes.
Most browsers default to 16px base. That means 1rem = 16px, 1.5rem = 24px, 2rem = 32px. The reference table at the bottom shows common conversions at a glance.
Using rem for font sizes and em for component-level spacing is a common best practice β em respects the local context, rem stays anchored to the root.
Tailwind CSS uses a 16px base. Its spacing scale (text-sm = 0.875rem = 14px, text-base = 1rem = 16px) is visible in the common sizes reference below.
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