Aspect Ratio Calculator (Resize Images & Video)
Aspect ratio calculator: simplify any width × height to a ratio (16:9, 4:3…) and resize images or video without distortion.
W₂H₂ = W₁H₁
How to use this calculator
- Type your input in the box.
- The result updates as you type.
- Use “Copy result” or “Copy link” to share it.
Divide both sides by their greatest common divisor. To resize, new height = new width × original height ÷ original width.
Frequently asked questions
1920 × 1080 resized to 1280 wide?
16:9, new size 1280 × 720.
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