Aspect Ratio Calculator
The resize is fine; the composition is not.
Aspect ratio
16:9
1.7778 to 1
Common ratios are 16:9 for video, 4:3 for older screens and prints, 3:2 for most cameras, and 1:1 for social. Mismatching the source ratio to the output is what produces unexpected crops: the resize is fine, the composition is not.
How the Aspect Ratio Calculator works
Mismatching source ratio to output is what produces unexpected crops. The resize itself is trivial arithmetic; what gets lost is composition, and no calculator can tell you which part of the frame mattered.
Also known as: image ratio calculator · 16:9 to 4:3 converter · resize keeping proportions
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Frequently asked questions
How do I calculate an aspect ratio?
Width divided by height. Simplifying by the greatest common divisor gives the familiar form, 1920 by 1080 reduces to 16:9.
What are the common ratios?
16:9 for video, 3:2 for most cameras, 4:3 for older screens and many prints, 1:1 for social feeds and 4:5 for the vertical social format.
How do I resize without distorting?
Change one dimension and calculate the other from the ratio. Setting both independently is what stretches an image.
What is the safest way to handle a ratio mismatch?
Shoot or design with the target crops in mind, leaving room at the edges. Composing tightly to one ratio guarantees a bad crop in another.