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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Frequently Asked Questions
How to use Aspect Ratio Calculator
- 1
Enter your details
Open Aspect Ratio Calculator and type your values into the fields. Calculate new dimensions while locking aspect ratio. Includes common passport photo ratios.
- 2
See the result instantly
The result updates automatically as you type — no button to press. All calculations run locally in your browser; nothing is sent to a server.
- 3
Adjust or copy
Change any input to recalculate immediately, then copy or note the result.
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.