Example: Pixel density 108.8 PPI. Change the values above to calculate your own.
About the PPI Calculator
Pixel density tells you how sharp a screen looks. A 27-inch 1440p monitor has about 109 PPI; a 27-inch 4K monitor about 163 PPI. Phones usually exceed 400 PPI.
How to use the PPI Calculator
- Enter your numbers (or keep the example).
- The result updates instantly as you type.
- Copy the result, or copy the link: it keeps your numbers so you can share them.
PPI of common screens
| Screen | Resolution | Size | PPI |
|---|---|---|---|
| Full HD monitor | 1920×1080 | 24" | 92 |
| QHD monitor | 2560×1440 | 27" | 109 |
| 4K monitor | 3840×2160 | 27" | 163 |
| 4K monitor | 3840×2160 | 32" | 138 |
| 13" laptop (16:10) | 2560×1600 | 13.3" | 227 |
| Phone | 1179×2556 | 6.1" | 461 |
How it's calculated
PPI = √(width² + height²) ÷ diagonal in inches.
Features
- Instant resultsUpdates as you type.
- Shareable linkThe URL keeps your inputs.
- Reference tableCommon values on this page.
- Works offlineRuns in your browser.
Frequently asked questions
Is the PPI Calculator free?
Yes, the PPI Calculator is free with no sign-up, no limits and no ads covering the result.
Does it work on my phone?
Yes. It works in any modern browser on phones, tablets and computers, and keeps working offline once the page has loaded.
Last updated · Processing happens locally in your browser.