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Aspect Ratio Calculator

Find the correct dimensions for any aspect ratio. Enter width and height to get the simplified ratio, or enter a target width to scale proportionally.

Simplified ratio
Decimal
Scaled width
Scaled height

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How to use Aspect Ratio Calculator

  1. Enter width and height to see the simplified ratio
  2. Or enter a known ratio and one dimension
  3. The tool calculates the missing side
  4. Copy the result for your design or video project

What is Aspect Ratio Calculator?

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FAQ

What ratios are supported?
Common presets include 16:9, 4:3, 1:1, 21:9, 9:16, plus custom ratio entry.
Can I use this for video?
Yes. It works for images, video frames, and responsive design breakpoints.

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Author

AR
Aisha Rahmani"The Visual Storyteller"

Design Technologist & Media Specialist

Aisha bridges the gap between pixels and code. With expertise in image processing, SVG optimization, and video compression, she helps creators, designers, and marketers prepare media that looks great and loads fast. She has spoken at design conferences about accessible visual content and has helped agencies reduce page-weight budgets by up to 60 percent without sacrificing creative quality.

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