Aspect Ratio

The aspect ratio is the ratio of the width of a shape to its height when the width is larger than the height, i.e. the shape is positioned as a "landscape" rather than "portrait".

The aspect ratio is expressed as two numbers separated by a colon (x:y). A common misunderstanding is that x and y represent actual length and height. This is false, they actually represent the relation between width and height. As an example 8:5, 16:10 and 1.6:1 is the same aspect ratio.

It may be applied to two characteristic dimensions of a three-dimensional shape.

Read more about Aspect RatioApplications and Uses, Maths and Aspect Ratio

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Maths and Aspect Ratio
... Aspect ratios are mathematically expressed as xy (pronounced "x-to-y") and x×y (pronounced "x-by-y"), with the latter particularly used for pixel dimensions ... Cinematographic aspect ratios are usually denoted as a (rounded) decimal multiple of width vs unit height, while photographic and videographic aspect ratios are usually defined and denoted by whole number ratios of ... digital images there is a subtle distinction between the Display Aspect Ratio (the image as displayed) and the Storage Aspect Ratio (the ratio of pixel dimensions) see distinctions, below ...
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... and surface, induced drag is reduced with increasing aspect ratio ... As a consequence, aircraft for which a high lift-to-drag ratio is desirable, such as gliders or long-range airliners, typically have high aspect ratio ... Winglets increase the effective aspect ratio of the wing, changing the pattern and magnitude of the vorticity in the vortex pattern ...

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