Aspect Ratio Calculator

The Aspect Ratio Calculator is an essential tool for designers, developers, photographers, and videographers who need to resize images or video frames while maintaining their original proportions. An aspect ratio is simply the relationship between the width and height of a rectangle, often expressed as two numbers separated by a colon (e.g., 16:9 for widescreen video). When you resize an image without preserving its aspect ratio, the result can look stretched, squashed, or distorted. This tool prevents that by automatically calculating the corresponding width or height when you change one of the dimensions.

This client-side utility provides instant feedback, making it a quick and reliable part of any creative or technical workflow. Because all calculations happen in your browser, your data is never sent to a server, ensuring complete privacy. Whether you're a web developer preparing images for a responsive layout, a video editor cropping footage for social media, or a graphic designer scaling artwork for print, this tool ensures your visuals always look their best. It's a simple solution to a common and critical task in digital media production. The core principle is maintaining visual integrity, so that the subjects in your photos and videos always appear natural and correctly proportioned, no matter the final size.

How to Use:

• Enter Original Dimensions: Start by inputting the width and height of your original image or video frame in the "Original Dimensions" section. This sets the aspect ratio the tool will maintain.
• Enter a New Dimension: In the "New Dimensions" section, enter either the new width or new height you want to achieve.
• View the Result: The tool will instantly calculate the other dimension to perfectly match the original aspect ratio.
• Lock/Unlock: By default, the aspect ratio is locked. This means changing one of the new dimensions will automatically update the other. You can click the lock icon to unlock it, allowing you to enter both new dimensions freely, which is useful if you want to calculate a new aspect ratio based on two custom dimensions.

Common Aspect Ratios:

• 16:9: The standard for widescreen TVs, monitors, and most online video (e.g., 1920x1080 pixels).
• 4:3: The traditional television and older computer monitor standard (e.g., 1024x768 pixels).
• 1:1: A perfect square, popular on social media platforms like Instagram.
• 3:2: The standard for 35mm film and many DSLR cameras.