Screen PPI Calculator
Calculate pixels per inch for any screen from its resolution and diagonal size
About this calculator
Calculate the pixels per inch (PPI) of any screen from its resolution and diagonal size. Determine whether a display qualifies as Retina or HiDPI based on its pixel density.
How to use the Screen PPI 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 on 24" = 91.79 PPI
- 2560×1440 on 27" = 108.79 PPI
- 3840×2160 on 27" = 163.18 PPI
- 2532×1170 on 6.1" = 460 PPI
- 2560×1600 on 13.3" = 227 PPI
Frequently asked questions
How does the Screen PPI 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 Screen PPI 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.