Aspect Ratio Calculator

Aspect ratio is the proportional relationship between width and height, expressed as two numbers (like 16:9). It matters because different platforms and media have standard ratios—using the wrong one can result in cropping, black bars, or distorted images.

Maintain the original aspect ratio by scaling width and height proportionally. If you know one new dimension, divide it by the corresponding original dimension to get your scale factor, then multiply the other dimension by that same factor.

Instagram supports multiple ratios: 1:1 (square) for classic posts, 4:5 (portrait) for maximum feed visibility, and 9:16 (vertical) for Stories and Reels. Portrait ratios typically get more engagement in feeds because they take up more screen space.

16:9 is wider and the standard for HD video and most modern displays, while 16:10 is slightly taller and provides more vertical space. 16:10 was popular for computer monitors and is still preferred by some professionals for productivity work.

Yes, but you'll either need to crop (losing some content) or add padding/borders. True aspect ratio conversion without these compromises would distort the image by stretching or squashing it, which rarely looks good.