PX to Percentage (%) Converter
Conversion Guide
1. Determine the context (e.g., parent element's width). 2. Divide the px value by the context, then multiply by 100. Example: For a 500px context, 50px / 500 * 100 = 10%.
Pixels to Percentage Conversion Table (Base size: 1000px)
| PX | Percentage (%) | Actions |
|---|---|---|
| 100 | 10% | |
| 200 | 20% | |
| 250 | 25% | |
| 300 | 30% | |
| 400 | 40% | |
| 500 | 50% | |
| 600 | 60% | |
| 700 | 70% | |
| 750 | 75% | |
| 800 | 80% | |
| 900 | 90% | |
| 1000 | 100% |
Frequently Asked Questions
Basics
What is PX?
A CSS pixel (px) is a standardized unit of measurement that aims to make elements appear at similar physical sizes across different devices. Unlike physical screen pixels, CSS pixels are an abstraction that automatically scales based on device characteristics and user zoom settings.
Are CSS pixels the same as physical screen pixels?
No. On high-DPI (Retina) displays, one CSS pixel may actually use multiple physical screen pixels. For example, on a 2x display, 1 CSS pixel equals 4 physical pixels (2x2).
When should I use pixels vs relative units?
Use pixels for precise visual elements that should maintain their exact appearance, like borders (1px), box shadows, and small decorative details. For layout and typography, prefer relative units (rem, em, %) to ensure better accessibility and responsive design.
Do pixel-based layouts work well on mobile?
Fixed pixel layouts often break on mobile devices due to varying screen sizes. It's better to use relative units for layouts to ensure your design adapts smoothly across devices.
What happens to pixel values when users zoom?
CSS pixels scale proportionally when users zoom. If a user zooms to 200%, a 16px font becomes equivalent to 32px, ensuring content remains readable.
Do pixels affect accessibility?
Yes. Using fixed pixel values for text and layout can prevent proper scaling when users change their browser's font size settings. This creates accessibility issues for users who need larger text.
What is Percentage (%)?
The percentage unit (%) is relative to the parent element's corresponding dimension. For width, it's relative to parent's width; for height, to parent's height.
How do percentages work with margins and padding?
For horizontal margins and padding, percentages are relative to the parent's width. For vertical margins and padding, they're also relative to the parent's width, not height.
When should I use percentage over viewport units?
Use percentages when you want elements to scale relative to their container rather than the viewport.
Conversion
How to convert PX to Percentage (%)?
To convert PX to Percentage (%), use the following formula:
(px / reference size) * 100