CalcOS

PPI Calculator

Live
Parameters
Horizontal width in pixels or geometry unit.
1,920
150,000
1,080
150,000
Screen diagonal measurement in inches.
15.6
1100
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Pixels Per Inch (PPI)
141.21 PPI
Pixel Pitch (Dot Pitch)0.1799 mm
Diagonal resolution2,203 Pixels
Physical Area density19,941 pixels/sq in
Mathematical Explanation
PPI=W2+H2D\text{PPI} = \frac{\sqrt{W^2 + H^2}}{D}

Calculates pixels per inch density. Computes diagonal pixel count using the Pythagorean theorem, divided by physical diagonal inches.

How to Use the PPI Calculator

Calculate your screen's pixel density with our free PPI calculator. Input the horizontal and vertical resolution (in pixels) and the diagonal physical screen size (in inches) to determine the Pixels Per Inch (PPI) and pixel pitch of any monitor, phone, or television.

Input variables:
  • Width (pixels): Width (pixels)
  • Height (pixels): Height (pixels)
  • Screen Diagonal (inches): Screen Diagonal (inches)

PPI Calculator Explained: Formula, Math, and Applications

Learn the mathematics, formulas, and real-world applications behind the PPI Calculator.

Read Full Guide →