Aspect Ratio Calculator
Calculate proportional image or video dimensions.
Processed locally in your browser
This tool runs entirely on your device. Your file is never uploaded to a server.
How to use Aspect Ratio Calculator
- 1Enter your original width and height.
- 2Enter either a new target width or height.
- 3The other dimension is calculated automatically to preserve the aspect ratio.
Features
- • Calculates missing width or height instantly
- • Shows the simplified aspect ratio (e.g. 16:9)
- • Works for any image, video, or screen dimension
Frequently asked questions
Resizing an image or video without preserving its aspect ratio stretches or squashes it. Calculating the correct proportional dimension keeps the content looking natural.