PX to Percentage Converter
Convert Pixels to Percentages in seconds. A simple tool for web designers to create fluid, responsive layouts that adapt seamlessly to changing viewport widths.
What Are PX and Percentage Units?
Pixels (px) are absolute units that define fixed sizes on the screen. They do not change automatically when the layout or container size changes.
Percentage (%) units are relative values calculated based on the size of a parent element. Percentages are commonly used to create flexible widths, heights, and spacing.
Using percentages instead of pixels helps layouts scale more naturally across devices.
Why Convert PX to Percentage?
PX to percentage conversion is especially useful when working with responsive or fluid layouts.
- Creates layouts that adapt to different container sizes
- Improves responsiveness across screen resolutions
- Useful for widths, heights, and positioning
- Reduces dependency on fixed dimensions
- Helps convert static designs into flexible CSS
How to Use the PX to Percentage Calculator
Using our calculator is simple and fast:
- Enter the pixel (px) value you want to convert.
- Provide the size of the parent container.
- The calculator instantly shows the percentage value.
- Copy the result and apply it in your CSS.
PX to Percentage Conversion Formula
The formula for converting PX to percentage is:
Percentage (%) = (PX ÷ Parent Size) × 100
The parent size depends on the container or element the percentage is relative to.
PX to Percentage Conversion Examples
Below are some examples using a parent container width of 1200px:
- 300px ÷ 1200 × 100 = 25%
- 600px ÷ 1200 × 100 = 50%
- 900px ÷ 1200 × 100 = 75%
Common Use Cases for Percentage Units
Percentage units are widely used in flexible layouts:
- Fluid grid systems
- Responsive images and containers
- Layout spacing relative to parent elements
- Positioning elements using percentages
- Converting fixed-width designs into responsive layouts
Percentage vs PX in CSS
PX values provide precision, while percentages provide flexibility.
Many layouts use percentages for widths and positioning, and pixels for borders, shadows, and fine details.
Frequently Asked Questions (FAQs)
What parent size is used for percentage conversion?
The percentage is calculated based on the size of the parent element, such as width or height.
Are percentage values always responsive?
Percentages respond to changes in the parent element’s size, making them flexible by nature.
Can percentages be used for font sizes?
Yes, percentages can be used for font sizes, but EM or REM units are often preferred.
Is PX to percentage conversion exact?
The calculation is mathematically exact, but the result depends on the parent container size.
Can I mix percentage and PX units?
Yes. Mixing relative and absolute units is common in modern CSS layouts.
Disclaimer: Percentage values depend on the size of the parent element. Results may vary if the container size changes or is dynamic.