The aspect ratio of a geometric shape is the ratio of its sizes in different dimensions.

Aspect ratio may also refer to:

• Aspect ratio (aeronautics), the ratio of a wing's span to its mean chord
• Aspect ratio (image), the ratio of an image's width to its height
• Display aspect ratio, the ratio of a computer monitor's width to its height
• Pixel aspect ratio, the ratio ratio of a pixel's width to its height in a digital image
• Automotive engine aspect ratio, controlled by variable-geometry turbochargers

This disambiguation page lists articles associated with the title Aspect ratio.
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