Aspect Ratio Calculator
Calculate and scale image dimensions perfectly.
Aspect Ratio Calculator
1. Detect from Image (Optional)
Click or drag image here
Upload an image to automatically detect its dimensions and ratio
2. Calculate Ratio
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Ratio W:
:
Ratio H:
What is an Aspect Ratio?
The aspect ratio of an image describes the proportional relationship between its width and its height. It is commonly expressed as two numbers separated by a colon, such as 16:9.
How to use this calculator
- Detect from Image: Simply drag and drop any picture into the upload zone. The calculator will instantly read the exact pixel dimensions and compute the aspect ratio.
- Calculate Dimensions: If you know you need an image in a specific ratio (like 16:9 for a YouTube thumbnail), enter the ratio, then type in your desired Width. The calculator will automatically tell you the exact Height you need to prevent stretching or distortion.