How to use this tool
Enter the requested values above. The result updates immediately so you can compare scenarios without creating an account or uploading data.
How the calculation works
Decimal screen ratio = width ÷ height
Example
A 2,400 × 1,080 screen has a decimal ratio of about 2.222:1.
Why this result matters
Knowing the actual screen ratio helps creators preview safe areas, plan responsive layouts, and avoid clipped controls on wide or tall devices.
Tips for a more useful estimate
- Use physical pixel dimensions when available.
- Test UI with safe-area insets as well as ratio.
- Do not assume every phone uses 16:9.
Frequently asked questions
Is resolution the same as screen size?
No. Resolution counts pixels; physical size is usually measured diagonally in inches.
Why is the result decimal?
A decimal ratio makes unusual mobile dimensions easy to compare.
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