Aspect Ratio Calculator
Find image and video aspect ratios, use presets like 16:9, and scale width or height proportionally.
Runs locally — nothing is uploaded
How to use
- 1
Enter dimensions
Type width and height in pixels or any unit.
- 2
Use presets
Quick-fill common ratios like 16:9 or 4:3.
- 3
Scale dimensions
Enter a target width or height to compute the matching side.
Frequently Asked Questions
The proportional relationship between width and height, expressed as W:H (e.g. 16:9).
Yes. The tool reduces dimensions to the smallest whole-number ratio using GCD.
They fill common ratios such as 16:9, 4:3, 3:2, 1:1, and 9:16 so you can start from a standard proportion.
Yes. Enter a target width to compute the matching height, or enter a target height to compute the matching width.
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