About REM to PX Conversion
REM (Root EM) units in CSS are relative to the root element's font size, while pixels (px) are fixed units. This converter helps you translate responsive REM units to precise pixel values.
How to Use This Tool
- Enter the REM value you want to convert
- Specify your base font size in pixels (default is 16px)
- Click "Convert to Pixels" to get the equivalent pixel value
- Copy the result for use in your designs
The Conversion Formula
The formula to convert REM to pixels is simple:
px = rem × base-font-size
For example, if your base font size is 16px and you want to convert 1.5rem to pixels:
1.5rem × 16px = 24px
When to Use This Conversion
- Design Handoffs: Convert designer's REM values to pixels for implementation
- Fixed Elements: When you need precise pixel measurements for certain elements
- Debugging: Understand the actual pixel size of REM-based elements
- Legacy Systems: Working with systems that require pixel values
REM vs PX: Key Differences
- REM is relative to the root element's font size
- PX is an absolute, fixed-size unit
- REM units scale with user's browser settings
- PX units remain the same regardless of user preferences
- Use REM for responsive designs, PX when precise control is needed
Best Practices
- Use REM for most sizing in responsive designs
- Only convert to PX when absolutely necessary
- Maintain accessibility by respecting user font size preferences
- Document your sizing strategy for team consistency