Aspect Ratio Calculator

Find missing dimensions to maintain an exact aspect ratio.

Common Ratios:

Ratio W

Ratio H

Width

Height

What is Aspect Ratio?

Aspect ratio is the proportional relationship between the width and the height of an image or video screen. It is commonly expressed as two numbers separated by a colon, such as 16:9. This calculator helps web designers, video editors, and photographers easily scale images up or down while ensuring they don't stretch or warp unnaturally.

Is it safe and private?

Yes, absolutely. All processing is done locally within your web browser using JavaScript. Your data is never transmitted to or stored on our servers, ensuring 100% privacy and security.