Aspect Ratio Calculator
Calculate aspect ratios, find missing dimensions, and preview common ratios for images and video.
Enter dimensions to calculate
Type width and height, or select a preset ratio
Common ratios
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Aspect Ratio Calculator: Find Perfect Dimensions
Calculate aspect ratios, find missing dimensions, and explore common presets for video, photography, and web design.
What Is Aspect Ratio?
Aspect ratio is the proportional relationship between the width and height of an image, video, or screen. It is expressed as two numbers separated by a colon — for example, 16:9 means the width is 16 units for every 9 units of height. Maintaining correct aspect ratios prevents visual distortion when resizing media.
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