PPI / DPI Calculator
Calculate screen pixel density from resolution and display size.
Screen specifications
Pixel Density
91.8
PPI
Low
Dots per cm
36.1
DPCM
Total pixels
2.07
Megapixels
Device reference
| Device | Resolution | Size | PPI | Class |
|---|---|---|---|---|
| iPhone 16 Pro | 1320×2868 | 6.3" | 501 | Ultra HD |
| iPhone 16 | 1179×2556 | 6.1" | 461 | Ultra HD |
| Samsung Galaxy S24 | 1080×2340 | 6.2" | 416 | Ultra HD |
| Google Pixel 9 Pro | 1344×2992 | 6.3" | 521 | Ultra HD |
| iPad Pro 13" | 2048×2732 | 13" | 263 | High |
| iPad Air 11" | 1668×2388 | 11" | 265 | High |
| MacBook Pro 16" | 3456×2234 | 16.2" | 254 | High |
| MacBook Air 13" | 2560×1664 | 13.6" | 225 | High |
| 4K UHD Monitor 27" | 3840×2160 | 27" | 163 | Standard |
| 1080p Monitor 24" | 1920×1080 | 23.8" | 93 | Low |
| 1440p Monitor 27" | 2560×1440 | 27" | 109 | Standard |
Calculate the pixel density (PPI) of any screen from its resolution and physical size. Compare against a reference database of popular devices.
Key Features
PPI Calculation
Computes pixels per inch using the Pythagorean diagonal formula: PPI = √(W²+H²) / diagonal.
Density Classification
Automatically labels the result: Ultra HD (≥400), Retina/HiDPI (≥300), High (≥200), Standard (≥100), or Low.
Total Megapixels
Shows the total pixel count as megapixels alongside PPI and DPCM.
Device Reference Table
11 popular devices across phones, tablets, laptops and monitors — filterable by type.
How to Use
- 1Enter the screen resolution (width × height in pixels) and the diagonal size in inches.
- 2PPI, DPCM, megapixels and density class are calculated instantly.
- 3Use the device table to compare your result with popular devices.