Reference library
Resolution to Aspect Ratio Lookup
Find the aspect ratio of common image, video and print dimensions. See the reduction steps and resize without distortion.
Choose an existing width and height to see its simplified ratio. These lookups explain the specific size, show the math, and include a proportional resizing calculator. Print measurements use matching units; digital video examples assume square pixels.
Find the 1920×1080 aspect ratio (16:9), see the reduction steps, and calculate resized dimensions without stretching.
2560×1440 Aspect Ratio: 16:9 CalculatorFind the 2560×1440 aspect ratio (16:9), see the reduction steps, and calculate resized dimensions without stretching.
3840×2160 Aspect Ratio: 16:9 CalculatorFind the 3840×2160 aspect ratio (16:9), see the reduction steps, and calculate resized dimensions without stretching.
1024×768 Aspect Ratio: 4:3 CalculatorFind the 1024×768 aspect ratio (4:3), see the reduction steps, and calculate resized dimensions without stretching.
1080×1350 Aspect Ratio: 4:5 CalculatorFind the 1080×1350 aspect ratio (4:5), see the reduction steps, and calculate resized dimensions without stretching.
1080×1920 Aspect Ratio: 9:16 CalculatorFind the 1080×1920 aspect ratio (9:16), see the reduction steps, and calculate resized dimensions without stretching.
512×768 Aspect Ratio: 2:3 CalculatorFind the 512×768 aspect ratio (2:3), see the reduction steps, and calculate resized dimensions without stretching.
2.5×3.5 Aspect Ratio: 5:7 CalculatorFind the 2.5×3.5 aspect ratio (5:7), see the reduction steps, and calculate resized dimensions without stretching.
Choose the right starting point
Use ratio guides when you already know the shape you need. Use resolution lookups when you know the existing dimensions. Use conversion planners when your source and destination have different shapes.
For a size not listed here, the main aspect ratio calculator accepts custom width and height values. You do not need a separate page for every possible dimension pair.
How these references are maintained
Ratio reductions, scale examples and crop geometry are calculated from the same tested functions used by the tool. Examples assume rectangular frames and matching measurement units. Platform requirements can change independently of the mathematics. Report an incorrect example through Contact us.