Tools / REM to PX Converter

REM to PX Converter

Convert REM to PX and PX to REM instantly in your browser. Custom root font-size, live CSS output, common values table and reference sizes. Free for developers, no signup, no upload.

Private All conversions run in your browser — nothing is uploaded
Root Font Size This is your html { font-size } value — usually 16px
px
REM
rem
= 16 px
Pixels
px
= 1 rem
CSS Output Ready-to-paste CSS using your current value 
font-size: 1rem; /* 16px */
Common REM → PX Values Based on your root font-size
REM Pixels Typical Use
Common CSS Sizes Reference Standard rem values for everyday UI
Font Sizes
0.75rem12px
0.875rem14px
1rem16px
1.125rem18px
1.25rem20px
1.5rem24px
2rem32px
Spacing
0.25rem4px
0.5rem8px
0.75rem12px
1rem16px
1.5rem24px
2rem32px
3rem48px
Borders & Radius
1px0.0625rem
0.125rem2px
0.25rem4px
0.5rem8px
0.75rem12px
1rem16px
9999pxpill
Runs 100% in your browser. Your values never leave your device.
Tip: REM (root em) is calculated from the root <html> font-size, not the parent element. This makes it more predictable than EM for responsive design and accessibility — users who change their browser's default font size will scale your entire layout proportionally.

What is the REM to PX Converter?

Convert REM to PX and PX to REM instantly in your browser. Custom root font-size, live CSS output, common values table and reference sizes. Free for developers, no signup, no upload.

It runs 100% in your browser — your files never leave your device, no signup is required, and there are no usage limits or watermarks.

How to Use the REM to PX Converter

  1. Paste, drop, or type your input into the tool above.
  2. Adjust the options to match what you need.
  3. Preview the result before copying or downloading.
  4. Everything is generated on your device — nothing is uploaded.

Why Use Our REM to PX Converter?

  • 100% private — files never leave your device.
  • No signup, no email, no limits — completely free.
  • Works on any device — desktop, tablet, mobile.
  • No watermarks, no hidden fees.

Frequently Asked Questions

Is the REM to PX Converter free?

Yes — completely free with no signup, no email, and no usage limits.

Are my files uploaded to a server?

No. Everything runs in your browser using JavaScript. Your files never leave your device.

Do I need to install anything?

No — just open this page in any modern browser (Chrome, Firefox, Safari, Edge).

Does the REM to PX Converter work on mobile?

Yes, on iOS and Android browsers. Very large files are best handled on desktop.

Is there a file size limit?

No hard limits. Files under 100 MB work well on most devices.

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