Aspect Ratio Calculator
Calculate width and height from aspect ratios. Pick a preset or enter a custom ratio to compute dimensions.
Aspect Ratio
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Dimensions (enter one, the other auto-calculates)
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About Aspect Ratio Calculator
Aspect ratio describes the proportional relationship between width and height. Common ratios include 16:9 (widescreen), 4:3 (standard), 1:1 (square), and 21:9 (ultrawide). This tool helps web developers, video editors, and photographers calculate exact pixel dimensions.
How It Works
Select a preset ratio or enter a custom one. Type a width to automatically calculate the matching height (or vice versa). The visual preview shows the proportional shape of the selected ratio.