Convertisseur DPI en PPI — Formule

Screen PPI Calculation

PPI = sqrt(W² + H²) / Diagonal Inches

Where W and H are the pixel dimensions.

Common Screen PPI

DeviceApprox PPI 24" 1080p monitor92 27" 4K monitor163 iPhone 15460 iPad Pro264

Exemple Résolu

1920x1080 display, 24-inch diagonal.

  1. Diagonal pixels = sqrt(1920² + 1080²) = 2203
  2. PPI = 2203 / 24 = 91.8 PPI
  3. Pixel size = 25.4 / 91.8 = 0.277 mm