PPI / Pixel Density Calculator

Calculate PPI

Horizontal Resolution (px)

Vertical Resolution (px)

Screen Diagonal (inches)

Formula

PPI = √(W² + H²) / diagonal

Frequently Asked Questions

What is PPI?

PPI (Pixels Per Inch) measures display sharpness. Higher PPI = sharper display. Retina displays are ≥220 PPI. Typical: phone 300-500 PPI, laptop 100-250 PPI, monitor 80-160 PPI. Formula: PPI = √(W² + H²) / diagonal.

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