Pixel, DPI and Print Size Calculator
Convert pixels and physical units or calculate print dimensions and required resolution
Pixels need a resolution
A pixel has no fixed physical length by itself. DPI or PPI determines how many image points fit in one inch. The formula is inches = pixels ÷ resolution, then centimetres = inches × 2.54.
DPI and PPI in context
PPI usually describes pixels per inch in an image or display. DPI strictly describes printed dots per inch. This geometric converter uses either as the same numeric density, although printing and rasterization can still differ.
Screen and print examples
At 96 PPI, 96 pixels equal exactly 1 inch or 2.54 cm. A 3,000-pixel-wide image at 300 PPI produces a print width of 10 inches or 25.4 cm.
The image file is not changed
Conversion does not resample pixels or edit metadata. Selected images are inspected locally only. Perceived print sharpness also depends on viewing distance, subject matter, printing process, and source quality.