Aspect Ratio Calculator
Calculate and convert image/video aspect ratios. Find dimensions for any target ratio.
Aspect Ratio
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Resize to target width/height
Common Aspect Ratios
About
The aspect ratio describes the proportional relationship between width and height. Common ratios include 16:9 (HD video), 4:3 (classic TV/monitors), 1:1 (square, Instagram), and 9:16 (vertical video). This calculator finds the greatest common divisor to simplify any dimensions to their simplest ratio.