How To Make Image Maintain Aspect Ratio Css

CSS Programming

When it comes to displaying images on a website, one important consideration is maintaining the aspect ratio. This ensures that the image doesn’t appear distorted or stretched on different devices or screen sizes. In this article, I will guide you through the process of making an image maintain its aspect ratio using CSS.

Understanding Aspect Ratio

Aspect ratio refers to the proportional relationship between the width and height of an image. For example, an image with an aspect ratio of 4:3 means that the width is 4 units and the height is 3 units. It’s important to preserve this ratio to avoid image distortion.

Using CSS to Maintain Aspect Ratio

There are several methods you can use to maintain the aspect ratio of an image using CSS. Let’s explore some of them:

Method 1: Using Width and Height

One straightforward method is to explicitly set the width and height of the image using CSS. By doing so, the image will maintain its aspect ratio even when the container size changes.

img {
width: 100%;
height: auto;

This CSS code sets the width of the image to 100% of its parent container while allowing the height to adjust automatically to maintain the aspect ratio. This ensures that the image will always fill the available space without distortion.

Method 2: Using Padding and Percentage-Based Width

Another approach is to use padding and a percentage-based width to maintain the aspect ratio. This method involves creating an element with a specific padding value and placing the image inside that element.

.aspect-ratio-container {
position: relative;
padding-bottom: 75%; /* 4:3 aspect ratio */

.aspect-ratio-image {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;

In this code snippet, we create a container element with a padding-bottom value that represents the desired aspect ratio. The image is then positioned absolutely inside the container, stretching to fill the available space.


Maintaining the aspect ratio of images in CSS is crucial for providing a visually pleasing experience across different devices and screen sizes. By using methods like setting width and height or using padding and percentage-based width, you can ensure that your images always display correctly.