Aspect Ratio Calculator
Calculate proportional dimensions for images and videos. Enter width, height, or ratio to instantly get the missing value. Common presets: 16:9, 4:3, 1:1, 3:2.
Free Runs in your browser Web Tools
16:9
Dimension Calculator (ratio: 16:9)
If width =→ height =—
If height =→ width =—
How to use
- 1 Enter the width and height of your original media (image, video frame, container).
- 2 The tool calculates and displays the simplified aspect ratio (e.g. 16:9).
- 3 Enter a new width to get the proportional height, or enter a new height to get the width.
- 4 Use it for responsive design, video thumbnails, or maintaining proportions when scaling.
Key features
- Calculates the simplified aspect ratio from any width and height
- Computes the missing dimension when width or height changes
- Supports any dimension — pixels, cm, inches, or abstract units
- Useful for responsive images, video embeds, and container sizing