THE WORLD'S LARGEST WEB DEVELOPER SITE
×

HOW TO

HowTo Home

Menus

Icon Bar Menu Icon Accordion Tabs Vertical Tabs Tab Headers Top Navigation Responsive Topnav Side Navigation Fullscreen Navigation Off-Canvas Menu Hover Sidenav Buttons Horizontal Scroll Menu Vertical Menu Bottom Navigation Responsive Bottom Nav Fixed Menu Slide Down Bar on Scroll Sticky Navbar Hover Dropdowns Click Dropdowns Dropdown in Navbar Mega Menu Pagination Breadcrumbs Button Group Vertical Button Group

Images

Slideshow Modal Images Lightbox Responsive Image Grid Image Grid Image Overlay Image Effects Image Text Full Page Image Hero Image Rounded Images Meet the Team Flip an Image Shake an Image Portfolio Gallery Portfolio with Filtering

Buttons

Alert Buttons Animated Buttons Social Media Buttons Loading Buttons Next/prev Buttons Round Buttons Scroll To Top Button

Forms

Login Form Signup Form Contact Form Responsive Form Clear Input Field Copy Text to Clipboard Animated Search Custom Checkbox/Radio Toggle Switch Password Validation Toggle Password Visibility Multiple Step Form

Filters

Filter List Filter Table Filter Elements Sort List Sort Table

More

Modal Boxes Timeline Progress Bars Skill Bar Range Sliders Tooltips Popups Calendar Responsive Tables HTML Includes To Do List Loaders Star Rating User Rating Overlay Effect Contact Chips Cards Profile Card Alerts Notes Labels Circles Coupon Fixed Footer Equal Height Clearfix Snackbar Scroll Drawing Pricing Table Parallax Aspect Ratio Build a Web Site Toggle Like/Dislike Toggle Hide/Show Toggle Class Add Class Remove Class Arrows Shapes Vertical Line Animate Icons Countdown Timer Typewriter Coming Soon Page Center Website Thumbnails Chat Messages Testimonials Draggable HTML Element Syntax Highlighter JS Animations

Grid

2 Column Layout 3 Column Layout 4 Column Layout Mixed Column Layout

Google

Google Maps Google Translate Google Charts Google Fonts

Converters

Convert Weight Convert Temperature Convert Length Convert Speed

How TO - Aspect Ratio


Learn how to maintain the aspect ratio of an element with CSS.


Aspect Ratio

Create flexible elements that keep their aspect ratio (4:3, 16:9, etc.) when resized:

What is aspect ratio?

The aspect ratio of an element describes the proportional relationship between its width and its height. Two common video aspect ratios are 4:3 (the universal video format of the 20th century), and 16:9 (universal for HD television and European digital television).


How To - Height Equal to Width

Step 1) Add HTML:

Use a container element, like <div>, and if you want text inside of it, add a child element:

Example

<div class="container">
  <div class="text">Some text</div> <!-- If you want text inside the container -->
</div>


Step 2) Add CSS:

Add a percentage value for padding-top to maintain the aspect ratio of the DIV. The following example will create an aspect ratio of 1:1 (the height and width is always equal):

Example 1:1 Aspect Ratio

.container {
    background-color: red;
    width: 100%;
    padding-top: 100%; /* 1:1 Aspect Ratio */
    position: relative; /* If you want text inside of it */
}

/* If you want text inside of the container */
.text {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
}
Try it Yourself »

Other aspect ratios:

Example 16:9 Aspect Ratio

.container {
    padding-top: 56.25%; /* 16:9 Aspect Ratio */
}
Try it Yourself »

Example 4:3 Aspect Ratio

.container {
    padding-top: 75%; /* 4:3 Aspect Ratio */
}
Try it Yourself »

Example 3:2 Aspect Ratio

.container {
    padding-top: 66.66%; /* 3:2 Aspect Ratio */
}
Try it Yourself »

Example 8:5 Aspect Ratio

.container {
    padding-top: 62.5%; /* 8:5 Aspect Ratio */
}
Try it Yourself »