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Aspect Ratio Calculator
ConversionOffline-ready
Aspect Ratio Calculator finds the missing dimension when you know the ratio and one side. Enter a width and height to calculate the ratio, or lock a ratio (16:9, 4:3, 3:2, 1:1) and enter one dimension to get the other. Useful for video production, image resizing, CSS layout, and responsive design. Runs entirely in your browser.