Instantly calculate and convert aspect ratios for any project. Whether you're resizing images, editing video, or working on a design, our ratio calculator ensures your dimensions are pixel-perfect every time.

Instantly calculate dimensions for any 4:3 aspect ratio. Enter one value to find the other for any resolution or pixel size. Perfect for fullscreen content.

Our 16:9 ratio calculator makes it easy to find the right dimensions for your HD videos and images. Convert any resolution to the widescreen format.

Our guide to image aspect ratios covers photo sizes, cropping, and social media formats. Use our free tool to calculate the perfect dimensions for your pictures.

An aspect ratio just describes the shape of a rectangle by comparing its width to its height. For example, a 16:9 ratio means for every 16 inches wide, the screen is 9 inches tall.