Aspect Ratio Calculator
Simplify a width and height to an aspect ratio and resize while keeping proportions.
🔒 Runs in your browser. Nothing you enter is uploaded or stored.
How to use it
Enter a width and height in pixels (or any unit) to see the simplified ratio, found by dividing both by their greatest common divisor. Enter a new width to get the matching height.
FAQ
What are common aspect ratios?
16:9 for HD video and most screens, 4:3 for older screens and many tablets, 3:2 for many cameras, 1:1 for square social posts and 9:16 for vertical video.
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