Private image preflight tool

Image DPI checker and print resolution calculator for photos

Inspect raster dimensions locally, choose a physical print size, and see effective PPI plus the source pixels required for a sharper result.

Choose a print imageJPEG, PNG, WebP, GIF, AVIF, or BMP

The image is decoded locally and is never uploaded.

Print widthPrint height

Measurement unitInchesCentimeters

Target resolution

Print readiness

No image selected

Upload a local image to calculate effective print resolution.

Pixels required for 300 PPI at this size2,400 × 3,000 px7.2 megapixels

How effective print PPI is calculated

Width PPI equals image pixel width divided by print width in inches. Height PPI uses the same formula. The lower of those two values limits usable detail because one dimension will run out of source pixels first.

DPI and PPI are related but not identical

PPI describes pixels from the source image per printed inch. Printer DPI describes physical ink or toner dots and is normally higher because many device dots reproduce one image pixel. This tool evaluates source-image density, not the printer's advertised hardware DPI.