What is an aspect ratio?

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Ratio Calculator

Solve missing ratio values (A:B = C:D), simplify ratios to lowest terms, and detect standard aspect ratios like 16:9.

Calculation Parameters

Ratio A

Ratio B

Common Presets:

Simplified Ratio

16 : 9(Widescreen (16:9))

1920 : 1080 reduces to 16 : 9 (Decimal: 1.7778)

Decimal Proportion1.7778

Percentage Proportion177.78%

Aspect ClassWidescreen (16:9)

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Select Simplify Ratio or Solve Missing Proportion.

Fill in A and B, plus C if solving for unknown D.

View lowest terms, decimal representation, and aspect ratio name.

verifiedAspect Ratio Detection

Automatically recognizes 16:9, 4:3, 1:1, and 21:9 screen formats.

verifiedGreatest Common Divisor

Reduces large dimensions (e.g. 3840:2160) to simplified mathematical form.

An aspect ratio is the proportional relationship between the width and height of an image or screen display.

Calculators

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