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Bootstrap 5 Ratios

Last Updated : 23 Jul, 2025

Bootstrap 5 provides ratios, which can be used to create fixed-ratio containers. These containers maintain a specific aspect ratio, regardless of the size of the screen or the content within them.

Bootstrap 5 Ratios:

  • Aspect ratio: The proportionality between an element's height and breadth is known as an aspect ratio. Aspect ratios are useful when we use videos, images, etc. The height-width relationship stays the same, as defined, regardless of the width. By default, the four aspect ratios are set in Bootstrap 5.
  • Custom Ratio: We can use bootstrap 5 custom ratios to set the aspect ratio using a CSS custom property. Components can have unique aspect ratios by simply substituting CSS variables for modifier classes. A CSS custom property or variable is present in the selector for each ratio-* class.
  • SASS map: Syntactically awesome stylesheet is used to customize the aspect ratio values. $aspect-ratios is used to customize the aspect ratio values.

Example 1: In this example, we will demonstrate bootstrap 5 aspect ratios.

Output:

👁 Image
bootstrap 5 ratios

Example 2: In this example, we will demonstrate bootstrap 5 Custom ratios.

Output:

👁 Image
bootstrap 5 ratios

Reference: https://getbootstrap.com/docs/5.0/helpers/ratio/

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