Aspect Ratio Calculator
Calculate new dimensions while locking aspect ratio. Perfect for resizing passport photos.
Original Dimensions
Calculate New Size
Enter original dimensions to calculate.
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What is Aspect Ratio?
Aspect ratio is the proportional relationship between an image's width and height. A 35×45mm passport photo has an aspect ratio of 7:9. When you resize an image, keeping the same aspect ratio prevents distortion.
Common Exam Photo Sizes
Indian exam portals commonly require photos at 3.5×4.5cm (passport size) or signatures at 2×7cm. Use the presets above to quickly set these ratios.