PX to REM Converter: Batch CSS Unit Conversion [2025]

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Convert pixel values to REM units with support for batch conversion. Perfect for modernizing legacy CSS and creating responsive designs.

✓ Batch Conversion✓ Custom Base Size✓ Real-time Results
1 rem = 16px (base size)

Batch Conversion

Features & Benefits

Core Features

  • •

    Batch Processing

    Convert multiple pixel values simultaneously

  • •

    Custom Base Size

    Adjust root font size for different projects

  • •

    Copy to Clipboard

    Quickly copy converted values

Key Benefits

  • •

    Time Saving

    Convert multiple values at once

  • •

    Accuracy

    Precise calculations to 4 decimal places

  • •

    Flexibility

    Works with any base font size

Conversion Guide

Single Values

  • • Enter pixel value
  • • See instant conversion
  • • Adjust base size if needed
  • • Copy result

Batch Mode

  • • One value per line
  • • Include 'px' unit
  • • Convert all at once
  • • Copy formatted results

Tips

  • • Check base size first
  • • Use for similar values
  • • Validate conversions
  • • Save common values

Frequently Asked Questions

What format should I use for batch conversion?

Enter one pixel value per line with the 'px' unit (e.g., "16px"). The converter will process each line and provide corresponding REM values.

How do I handle decimal values?

The converter handles decimal values automatically and provides results to 4 decimal places for maximum precision in your CSS.

Can I change the base font size?

Yes, you can adjust the base font size to match your project's root font size. The default is 16px, but you can change it to any value.

Which values should I convert to REM?

Generally, convert font sizes, margins, padding, and layout dimensions to REM. Keep border widths and small decorative elements in pixels.

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