Aspect Ratio Calculator
Find the missing width, height, or ratio instantly. 100% client-side, no upload needed.
Input
Result
Enter values to calculate
Common use cases
Figure out the right dimensions for a video export, a responsive image, or a social media post — enter what you know (like a target width) and a ratio like 16:9 or 9:16, and get the missing dimension instantly.
Fast and Precise
- Live Calculation: Results update instantly as you type, no button to click.
- Built-in Presets: Common ratios like 16:9, 4:3, and 9:16 are one click away.