About PX to Percentage Conversion
Percentage units in CSS are relative to the size of their parent element, making them ideal for responsive design. Unlike pixels (px) which are fixed units, percentage units scale with their container.
How to Use This Tool
- Enter the pixel value you want to convert
- Specify the parent element's size in pixels
- Click "Convert to Percentage" to get the equivalent % value
- Copy the result and use it in your CSS
The Conversion Formula
The formula to convert pixels to percentage is:
percentage = (px / parent-size) × 100%
For example, if your parent element is 200px wide and you want to convert 50px to percentage:
(50px / 200px) × 100% = 25%
Why Use Percentage Units?
- Responsiveness: Percentage units automatically adapt to their container size
- Fluid Layouts: Perfect for creating flexible designs that work on different screen sizes
- Maintainability: Change the parent size to adjust all child elements proportionally
- Consistency: Helps maintain proportional relationships between elements
Best Practices
- Use percentage units for widths, heights, and spacing in fluid layouts
- Combine with max-width/min-width for better control
- Be mindful of nested percentage values (they compound)
- Test your layout at different screen sizes