PPI Calculator

Determine the precise pixel density of your display. Essential for measuring sub-pixel rendering quality and sharpness.

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Pixels Per Inch (PPI)

The Mathematics of Pixel Density

What is PPI?

PPI (Pixels Per Inch) is a measurement of the pixel density of a digital display. It defines how many individual pixels are packed into a single square inch of the panel. Higher PPI results in greater detail and sharper text rendering.

Impact on Hardware Diagnostics

When using our Display Test tools, knowing your PPI helps you understand why a dead sub-pixel might be nearly invisible on a 4K 14-inch laptop screen while being obvious on a 27-inch 1080p monitor.

PPI Calculator FAQ

What is a "good" PPI for a monitor?

For desktop use, 90-110 PPI is ideal for native scaling. Professionals often prefer 160-220 PPI for a "Retina" experience, requiring 200% OS scaling.

Is PPI the same as DPI?

No. PPI refers to pixels on a digital screen, while DPI (Dots Per Inch) is a printing term for ink dots on paper. They are often confused but technically distinct.