Aspect Ratio Calculator
Find the simplified aspect ratio of an image or calculate a matching height from a target width. Useful for images, video, thumbnails, and social media layouts.
aspect ratio = width : height
Formula: Simplify width and height by dividing both numbers by their greatest common divisor.
Aspect Ratio Calculator
Results are calculated in your browser. For image, AI, and cooking tools, assumptions can affect the final result.
Formula and examples
Simplify width and height by dividing both numbers by their greatest common divisor.
| Example | What it means |
|---|---|
| 1920 x 1080 simplifies to 16:9. | Practical reference value |
| 1080 x 1080 simplifies to 1:1. | Practical reference value |
| 1080 x 1350 simplifies to 4:5. | Practical reference value |
Common mistakes
- Do not crop an image unless the target ratio is different.
- Resizing keeps ratio only if width and height scale together.
- Social media platforms may crop images if the ratio is outside their accepted range.
FAQ
What is aspect ratio?
Aspect ratio is the relationship between width and height, written like 16:9 or 4:5.
How do I keep the same aspect ratio?
Scale width and height by the same proportion.
What is 1920 x 1080?
1920 x 1080 is a 16:9 aspect ratio.
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Last updated
Last updated on June 8, 2026. This page is designed as a practical calculator and reference. Always verify official requirements for passport, print submission, billing, or professional production work.