Aspect Ratio Calculator
Calculate dimensions, aspect ratios, and resize proportionally.
About the Aspect Ratio Calculator
Calculate aspect ratios and resize dimensions proportionally. Perfect for images, videos, and responsive design.
Why client-side?
Every byte you paste, type, or upload here is processed entirely inside your browser. Nothing is sent to a server, logged, or stored. That means it's safe to use this tool on production secrets, customer data, internal logs, and any input you would not paste into a hosted SaaS formatter.
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Frequently Asked Questions
- How do I calculate the aspect ratio of an image?
- Enter the width and height of your image, and the tool calculates the simplified aspect ratio (e.g., 16:9, 4:3).
- How do I resize an image while keeping the aspect ratio?
- Enter one dimension (width or height) and the tool automatically calculates the other dimension to maintain the original aspect ratio.
- What are common aspect ratios?
- Common aspect ratios include 16:9 (widescreen), 4:3 (standard), 1:1 (square), 21:9 (ultrawide), and 9:16 (vertical/mobile video).