ToolnozaPixels to print-size formula
Print dimension in inches = pixel dimension ÷ pixels per inch (PPI, often called DPI in print settings). To convert inches to centimetres, multiply by 2.54. Calculate width and height separately using the same resolution value.
Example: 3000 × 2400 pixels at 300 PPI
Width = 3,000 ÷ 300 = 10 inches. Height = 2,400 ÷ 300 = 8 inches. The print is about 25.4 × 20.32 cm before trimming or bleed. At 150 PPI, the same pixels correspond to 20 × 16 inches.
DPI is not a full quality score
The calculation describes sampling density at a selected print size. It does not add image detail or confirm that a printer can reproduce it. Focus, source quality, viewing distance, paper and printer all matter. Keep the aspect ratio when resizing unless you intend to crop.
Frequently asked questions
Is PPI the same as printer DPI? They describe related but different stages: image pixels per inch and printer dots per inch. Can I enlarge a photo by choosing lower PPI? It makes a larger print with fewer pixels per inch but does not create detail. Should I crop first? Check the intended paper ratio and preserve any required bleed.