Video Aspect Ratio Calculator
Enter a source video size and calculate matching width or height without stretching. Useful for Shorts, Reels, YouTube, and social video exports.
Source size
Target basis
Result
Simple ratio
16:9
From width 1080
1080 x 608
From height 1920
3413 x 1920
Calculate platform-ready video dimensions
The aspect ratio calculator reduces a source width and height to a simple ratio, then calculates the matching opposite side for a known width or known height.
Use common presets like 16:9, 9:16, and 1:1 for landscape, vertical, and square video planning. It helps avoid stretched video and unexpected cropping before export.
The calculation runs instantly in your browser. No file upload is needed, and the numbers you enter are not sent to a server.
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