Design & Technology Calculators
Aspect ratios and screen dimensions for video, photography and web design.
About these calculators
Ratios and dimensions for screens, video and print. The recurring problem is that a shape and a size are different things: 1280×720 and 3840×2160 are both 16:9, and knowing the ratio tells you nothing about the resolution until you fix one side.
The calculator here reports the true reduced ratio rather than rounding to the nearest familiar one — most ultrawide monitors are 43:18, not the 21:9 they are sold as — and names the marketing label alongside it so both answers are visible.
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