What is a Px to Rem Converter?
In modern web design, using relative units like REM and EM is crucial for accessibility and responsive layouts. A Px to Rem converter helps you translate fixed pixel values from design tools (like Figma or Adobe XD) into scalable CSS units.
How to use this tool? (Step-by-step guide)
Set your 'Base Font Size' (default is 16px). Enter a value in any field (Px, Rem, or Em), and the other units will update automatically. Use the cheat sheet at the bottom for quick reference.
- Define your project's **Base Font Size** in the first field.
- Enter the pixel value you want to convert in the **Pixels (px)** box.
- Observe the **Rem** and **Em** values calculated automatically.
- Alternatively, enter a Rem value to see its Pixel equivalent.
- Use the **Cheat Sheet** table for instant reference of common design sizes.
Why do you need relative units? (Use cases)
Using fixed pixels can break your site's layout for users who rely on browser font scaling for accessibility. Translating your designs into Rem units ensures a professional, accessible, and robust user experience across all devices.
- Accessibility: Allows users to resize text comfortably in their browsers.
- Responsiveness: Simplifies scaling layouts across different screens.
- Consistency: Ensures all components scale proportionally to the root font size.
Frequently Asked Questions (FAQ)
What is the standard base font size?
Most modern browsers use a default root font size of 16 pixels. Our tool uses 16px as the default, but you can change it to match your specific project settings.
Rem vs Em: What is the difference?
REM is relative to the root HTML font size, making it consistent everywhere. EM is relative to its parent element's font size, which is useful for component-level scaling.
Should I use pixels or relative units?
Relative units (Rem/Em) are better for accessibility and responsive design, as they scale when a user changes their browser's default font size.
How do I use the conversion table?
The table shows common pixel values (like 8, 12, 16) and their Rem equivalents based on your current base size. It's a quick cheat sheet for common design tokens.
Is this tool accurate for high-DPI displays?
Yes, the calculations are mathematical ratios. CSS pixels are abstract units that remain consistent across different display densities.