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Instant result
The result is updated directly from the data entered.
Online Calculator
Aspect ratio calculator
Enter original width and height and calculate a new proportional height from the new width.
Width-to-height ratio
1.78
New height at original aspect ratio
720
Information
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Local processing
The calculations are done in your browser without sending the values to a server.
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Free
No registration, subscription, or paid API required.
Frequently asked questions
What is an aspect ratio?
It is the ratio between width and height of an image or video.
Does it serve to resize images?
Yes. It allows a new height to be calculated while maintaining the same proportion.
Can I use pixels?
Yes. It's the most common use.
Does it work with any unit?
Yes, as long as you use the same unit for width and height.