Aspect Ratio Calculator
Productivity ToolsToolio Aspect Ratio Calculator finds the unknown side of a rectangle from a ratio and one known length. Use it for video embeds, image crops, and CSS aspect-ratio. Math runs in the browser.
87k uses · Runs locally
How to use
- 1Enter the ratio such as 16:9.
- 2Provide width or height.
- 3Calculate the missing side.
- 4Use the pair in CSS or an image crop.
Benefits
- Keep media proportional without a whiteboard.
- Numbers stay on this device.
- Pairs with image resize next.
Frequently asked questions
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