Use this calculator to determine the aspect ratio of an image or to calculate new dimensions while maintaining an existing aspect ratio.
1. Find Aspect Ratio
Enter the original width and height of your image to find its aspect ratio.
2. Scale Image Dimensions
Enter the original dimensions and then either a desired new width or a desired new height to calculate the corresponding dimension while preserving the aspect ratio.
An image aspect ratio describes the proportional relationship between its width and its height. It's typically expressed as two numbers separated by a colon, such as 16:9 or 4:3. For example, a 16:9 aspect ratio means that for every 16 units of width, there are 9 units of height. This ratio remains constant regardless of the image's actual pixel dimensions.
Why is Aspect Ratio Important?
Understanding and maintaining correct aspect ratios is crucial for several reasons:
Visual Consistency: It ensures your images and videos display correctly across different devices and platforms without appearing stretched or squashed.
Professional Appearance: Distorted images look unprofessional and can detract from your content's quality.
Web Design: Web developers often need to specify image dimensions or aspect ratios in CSS to create responsive layouts that adapt to various screen sizes.
Social Media: Different social media platforms (e.g., Instagram, Facebook, YouTube) recommend or require specific aspect ratios for optimal display of profile pictures, cover photos, stories, and video thumbnails.
Photography and Videography: Photographers and videographers compose their shots with specific aspect ratios in mind, influencing the framing and overall aesthetic.
Common Aspect Ratios
Here are some of the most frequently encountered aspect ratios:
1:1 (Square): Popular for profile pictures and Instagram posts. Examples: 1080×1080 pixels.
4:3 (Standard Definition TV): Common in older televisions, computer monitors, and some digital cameras. Examples: 640×480, 1024×768 pixels.
3:2 (Classic Photography): Often found in DSLR cameras and traditional film photography. Examples: 1800×1200, 3000×2000 pixels.
16:9 (Widescreen): The standard for modern high-definition televisions, computer monitors, and most online video content (YouTube, Netflix). Examples: 1280×720 (HD), 1920×1080 (Full HD), 3840×2160 (4K UHD) pixels.
21:9 (Ultrawide): Used for cinematic displays and some specialized computer monitors.
How to Use the Calculator
Our Image Aspect Ratio Calculator provides two main functions:
Find Aspect Ratio:
If you have an image and want to know its aspect ratio, simply enter its original width and height in pixels into the "Original Width" and "Original Height" fields under the "Find Aspect Ratio" section. Click "Calculate Ratio," and the tool will simplify the ratio (e.g., 1920×1080 becomes 16:9) and show you the decimal equivalent.
Example: An image with dimensions 1920 pixels wide and 1080 pixels high will result in an aspect ratio of 16:9.
Scale Image Dimensions:
If you need to resize an image but want to maintain its original proportions, use the "Scale Image Dimensions" section. Enter the image's current width and height into the "Original Width" and "Original Height" fields. Then, decide if you want to set a new width or a new height. Enter only ONE of these values into either "Desired New Width" or "Desired New Height." Click "Calculate Scaled Dimensions," and the calculator will provide the corresponding dimension to keep your image perfectly proportional.
Example 1: You have an image that is 1920px wide by 1080px high (16:9). You need it to be 800px wide. Enter 1920 as Original Width, 1080 as Original Height, and 800 as Desired New Width. The calculator will tell you the new height should be 450px (800×450).
Example 2: You have an image that is 600px wide by 800px high (3:4). You need it to be 1200px high. Enter 600 as Original Width, 800 as Original Height, and 1200 as Desired New Height. The calculator will tell you the new width should be 900px (900×1200).
Using this tool helps ensure your images always look their best, preventing distortion and maintaining visual integrity across all your digital platforms.