Aspect Ratio Calculator
Calculate proportional dimensions for images and video.
Processed on your device. Inputs are not uploaded.Your result
Enter your values to get started.
How to use
Enter original pixel dimensions and a desired width to calculate the matching height.
Example
1920 × 1080 simplifies to 16:9; at 800 pixels wide, the height is 450.
Limitations
Dimensions must be positive whole numbers. The calculated target height is rounded to the nearest pixel.
Privacy
Your input stays in browser memory while you use this page. It is not uploaded or saved. Downloads are saved only when you choose to save them.