Wiggers.cloud Ratio Calculator

Free online tool to calculate padding ratios for responsive designs. Perfect for maintaining aspect ratios in layouts and background images.

  1. 1

    Enter the desired width and height in pixels

  2. 2

    Copy the generated CSS padding

  3. 3

    Apply to your container element

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CSS Padding:

Enter dimensions

Calculated Ratio:

Enter dimensions

Closest Common Ratio:

Enter dimensions

How to use aspect ratios

1. Add the padding-bottom CSS to your container:

.aspect-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* For 16:9 ratio */
}

2. Position your content absolutely within the container:

.aspect-content {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

Understanding Aspect Ratios in Web Design

Aspect ratios are fundamental to responsive web design, ensuring content maintains its proportions across different screen sizes. Common ratios like 16:9 for video content, 4:3 for traditional displays, and 1:1 for social media images are essential in modern web development.

Why Padding-Based Aspect Ratios Matter

The padding-based technique for maintaining aspect ratios is widely adopted because it's both reliable and performant. Unlike fixed-height solutions, padding-bottom percentages are calculated based on the container's width, creating a responsive solution that works across all devices and prevents content jumps during page load.

Common Use Cases

  • Responsive video embeds from platforms like YouTube and Vimeo
  • Image galleries and media containers that maintain consistent dimensions
  • Interactive maps and data visualizations
  • Background images in hero sections and cards
  • Slideshows and carousel components

By using this calculator, developers can quickly generate the correct padding-bottom values for any desired aspect ratio, streamlining the process of creating responsive layouts that look great on all devices.