PX to REM Converter
Convert pixel values to REM units
PX to REM Converter is a free online tool from BrowserUtils that convert pixel values to rem units. It runs entirely in your browser — your data never leaves your device. No account required.
| Pixels | REM |
|---|---|
| 12px | 0.75rem |
| 14px | 0.875rem |
| 16px | 1rem |
| 18px | 1.125rem |
| 20px | 1.25rem |
| 24px | 1.5rem |
| 32px | 2rem |
| 48px | 3rem |
| 64px | 4rem |
How to use PX to REM Converter
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About PX to REM Converter
Free online PX to REM converter. Convert CSS pixel values to REM units based on a configurable root font size. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
PX to REM Converter specs
- Runtime
- 100% client-side (browser)
- Built on
- CSS Color Module Level 4 conversions (sRGB, OKLCH, OKLAB) and native CSSOM parsing
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
What is the difference between PX and REM in CSS?
PX (pixels) is an absolute unit that stays the same size regardless of user settings, while REM is relative to the root element font size. Using REM allows your layout to scale proportionally when users change their browser font size.
How do I convert pixels to REM?
Divide the pixel value by the root font size (typically 16px). For example, 24px equals 1.5rem when the root font size is 16px. This tool handles the calculation automatically for any base size you configure.
Can I change the base font size in the PX to REM converter?
Yes, you can set the root font size to any value. The default is 16px, which matches most browser defaults, but you can adjust it to match your project settings.
Should I use REM or EM for responsive design?
REM is generally preferred because it always references the root font size, making calculations predictable. EM is relative to the parent element font size, which can cause compounding issues in nested elements.
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