How this tool works
New height = new width x original height / original width. The ratio is also reduced using the greatest common divisor.
Aspect Ratio Calculator
Resize width or height while keeping the same aspect ratio.
Formula
Aspect ratio compares width with height. If one dimension changes, the other changes by the same ratio to avoid distortion.
Example
A 1920 x 1080 image has a 16:9 ratio. If width becomes 1280, matching height is 720.
Common mistake
Do not resize width without adjusting height unless distortion is acceptable.