DPI to PPI Converter — Formula
## Screen PPI Calculation
**PPI = sqrt(W² + H²) / Diagonal Inches**
Where W and H are the pixel dimensions.
### Common Screen PPI
| Device | Approx PPI |
|---|---|
| 24" 1080p monitor | 92 |
| 27" 4K monitor | 163 |
| iPhone 15 | 460 |
| iPad Pro | 264 |
**PPI = sqrt(W² + H²) / Diagonal Inches**
Where W and H are the pixel dimensions.
### Common Screen PPI
| Device | Approx PPI |
|---|---|
| 24" 1080p monitor | 92 |
| 27" 4K monitor | 163 |
| iPhone 15 | 460 |
| iPad Pro | 264 |
Exemplo Resolvido
1920x1080 display, 24-inch diagonal.
- Diagonal pixels = sqrt(1920² + 1080²) = 2203
- PPI = 2203 / 24 = 91.8 PPI
- Pixel size = 25.4 / 91.8 = 0.277 mm