REM to PX Converter
See exact pixel values for your REM units
💡 Calculation: 16px ÷ 16 = 1.0000rem
Quick Reference
| Pixels | REM | Common Use |
|---|---|---|
| 8px | 0.500rem | Small spacing, icons |
| 12px | 0.750rem | Caption text |
| 14px | 0.875rem | Small body text |
| 16px | 1.000rem | Base body text |
| 18px | 1.125rem | Large body text |
| 20px | 1.250rem | Small headings |
| 24px | 1.500rem | H4/H5 |
| 32px | 2.000rem | H3 |
| 40px | 2.500rem | H2 |
| 48px | 3.000rem | H1 |
| 64px | 4.000rem | Hero text |
Batch CSS Converter
Paste CSS with px values and convert them all to rem instantly
Why use REM?
REM units scale based on the root font size, making your design more accessible and responsive. Users can adjust their browser's font size, and REM units will scale accordingly. This tool assumes the standard browser default of 16px = 1rem.
What is REM to PX Conversion?
REM units are powerful for responsive design, but sometimes you need to know the exact pixel output. When aligning with fixed-size assets, debugging layouts, or communicating with stakeholders, pixel values provide clarity.
Designers often specify layouts in pixels before developers convert to REM. When something looks off, converting back to pixels helps identify whether the implementation matches the design spec exactly.
Why Convert REM to PX?
Debugging layout issues often requires pixel precision. Browser DevTools show computed pixel values, so matching your code to those numbers helps identify discrepancies quickly.
Stakeholder communication also benefits from pixel values. When a client asks "how big is that heading?", answering "2.5rem" confuses them. "40 pixels at default settings" makes immediate sense.
How the Conversion Works
The formula reverses the px-to-rem calculation:
Pixels = REM × Base Font Size
At 16px base, 1.5rem equals 24px. The key is knowing your project's base font size—if someone set it to 62.5% (10px), then 1.5rem is only 15px.
Our tool handles various base sizes and shows the relationship clearly, preventing math errors in production CSS.
Common Use Cases
- Debugging responsive layouts
- Matching designs to pixel-perfect specs
- Communicating sizes to non-developers
- Converting component library documentation
Pro Tip
Different base font sizes explain why the same REM value looks different across projects. Always check the root font-size first.
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