PX to Percent Converter

How px to percent conversion works

Percentages in CSS are relative to the parent element. The formula is (pixels ÷ parent width) × 100. Use this when you need a width, margin, or padding to scale with the container.

Formula

• Percent = (Pixels ÷ Parent size) × 100
• Example: 32px inside 320px = 10%
• Change the parent width above to match your layout

When to use percent

• Fluid layouts that resize with the viewport
• Widths and spacing that should scale with a container
• Responsive design without media queries for that value