DPI / PPI Calculator

Find DPI, PPI, or required resolution for print.

CALCULATE

Formulas

PPI = √(W² + H²) / diagonal

Print: 300 DPI standard. Web: 72-96 PPI. Retina: 220+ PPI.

DPI vs PPI

PPI = pixels per inch (screens). DPI = dots per inch (printers). For print: 300 DPI minimum. For large format/posters: 150 DPI ok. For web: 72 PPI standard, 144+ for retina.

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