Print prep — verify an image is high enough resolution.Photo gear — pick the right camera for required print size.Display design — pick assets for HiDPI screens.Scanning — choose scan resolution for archive quality.

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DPI Calculator

Calculate DPI/PPI from image pixels and physical print size. Convert between dots per inch, pixels, inches, and millimeters. Runs in your browser.

Print DPI

Calculate the DPI of a print from image pixels and physical size.

Pixel width

Pixel height

Print width

Print height

Units

Print DPI

Screen PPI

Calculate the PPI of a screen from resolution and diagonal size.

Screen width (px)

Screen height (px)

Diagonal

Screen PPI

Reference

What is DPI?

DPI (dots per inch) and PPI (pixels per inch) describe pixel density. 72 DPI is web standard; 300 DPI is print quality; 600+ DPI is professional or fine-art print. To find DPI: divide pixel count by physical inches. Phones now hit 400–500 PPI; Retina displays use ~220 PPI at typical viewing distance.

Common uses

Print prep — verify an image is high enough resolution.
Photo gear — pick the right camera for required print size.
Display design — pick assets for HiDPI screens.
Scanning — choose scan resolution for archive quality.

Privacy

All calculations run 100% in your browser. No data is sent to any server.

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