Aspect ratio calculator
Calculate and convert aspect ratios for images, videos, and monitors. Scale dimensions proportionally without distorting resolution.
Original dimensionsPixels or units
px
px
16:9Decimal ratio: 1.778
Resize & scale preview
px
px
Proportional ratio & scaling
Popular presets
How it works
1
Enter original dimensions
Provide the original pixel width and height or pick a standard preset.
2
Instant simplification
Computes the greatest common divisor to produce simplified fractions like 16:9.
3
Proportional resize
Enter any target width or height to compute the matching proportional dimension.
More tools
CalculatorsLCM and GCD calculator
Calculate the Least Common Multiple and Greatest Common Divisor.
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