Aspect Ratio Calculator

This free aspect ratio calculator can help you find the aspect ratio of any rectangular shape. You can also use it to calculate the width or height for a given aspect ratio. The aspect ratio is the proportional relationship between the width and height of an image. It is commonly expressed as two numbers separated by a colon, as in 16:9. For example, a square image has an aspect ratio of 1:1, since the height and width are the same. An image with a 4:3 aspect ratio is 4 units wide for every 3 units high. An image with a 16:9 aspect ratio is 16 units wide for every 9 units high.