Aspect Ratio Calculator
Find an aspect ratio, and the matching size when you resize.
Questions
How is the aspect ratio calculated?
The width and height are divided by their greatest common divisor. 1920 × 1080 share a divisor of 120, which gives 16:9. Sizes that don’t reduce neatly, like 1366 × 768 (683:384), are also compared with the nearest common ratio.
How do I resize without stretching?
Type the new width and the height is calculated for you, or type the height to get the width. The answer is exact; for images and video round it to whole pixels, shown under the fields.
Which aspect ratios are common?
16:9 for video, TVs and most monitors; 4:3 for older screens and many compact cameras; 3:2 for most camera sensors; 1:1 and 4:5 for social media posts; 9:16 for vertical video and stories; 21:9 for ultrawide monitors; 2.39:1 for widescreen cinema.
Is it free? Do I need an account?
It is free to use and there is nothing to sign up for. There are no watermarks and no daily limits.
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