Calculate aspect ratios, resize dimensions, and preview common presets. Free online tool, no sign-up required.
Calculate ratios, resize dimensions, and preview common presets
Aspect Ratio
16:9
Decimal: 1.7778
Enter a new width or height to calculate the other dimension while maintaining the ratio.
16:9
1920 x 1080
An aspect ratio describes the proportional relationship between an image's width and height. Common ratios include:
The ratio is calculated using the Greatest Common Divisor (GCD) of width and height.