Aspect Ratio Calculator
Find the reduced ratio of any dimensions, or scale one dimension while keeping the ratio fixed
About this calculator
Calculate and scale aspect ratios for images, videos, and screens. Find the simplified ratio from dimensions, or scale one dimension while preserving the aspect ratio. Useful for responsive design and video editing.
How to use the Aspect Ratio Calculator tool
- Enter or paste your input into the field.
- Read the output — it updates instantly as you type.
- Adjust the options, if any, to fit your use case.
- Copy the page URL to share the exact result.
Common examples
- 1920×1080 = 16:9 (Full HD)
- 3840×2160 = 16:9 (4K UHD)
- 1080×1080 = 1:1 (square)
- 1080×1350 = 4:5 (portrait)
- 2560×1440 = 16:9 (QHD)
Frequently asked questions
How does the Aspect Ratio Calculator tool work?
Enter or paste your input and the tool processes it directly in your browser, showing the result immediately. Nothing you type is uploaded to a server — the entire computation happens on your device.
When would I use the Aspect Ratio Calculator tool?
It is handy for development, debugging, design and administration tasks — whenever you need this transformation or check done quickly without installing anything or trusting a third-party service with your data.
How reliable are the results?
The tool implements the relevant standard or specification directly, so its output matches what compliant software produces. Edge cases such as empty or malformed input are reported clearly instead of failing silently.
Can I share a specific result with someone else?
Yes. Your input updates the URL, so copying the address bar and sharing the link reopens the tool in the same state for whoever clicks it.