Aspect Ratio Calculator
Enter the known values below. Calculations update immediately in the browser and no image is required.
- Aspect ratio
- 4:3
- Decimal ratio
- 1.3333
- Closest common ratio
- 4:3
1:1
4:3
3:2
16:9
4:5
9:16
How to use the result
Start with the destination requirement and treat the output as a planning aid. Dimension and ratio calculations are exact for the entered numbers, while file-size estimates remain a range because image complexity and browser encoders vary.
Apply the calculated dimensions in the full image editor, choose contain or cover, select a format, and inspect the downloaded file.
Open Image ResizerImportant limitations
A calculator cannot add detail to a small original, predict every platform’s later compression, or guarantee visual quality. Keep the source, confirm current platform requirements, and make a test upload or print when the result matters.