What Are DPI and Print Size?
DPI (dots per inch) is how many dots are printed per inch and it determines print sharpness. On screen an image is defined only by its pixel count; but when printed, the same pixels produce different physical sizes depending on the DPI you choose. This tool works both ways: it computes how many centimetres your image prints at from its pixels and DPI, or how many pixels you need for a desired print size.
The Formula
Print size (inch) = pixels ÷ DPI. For centimetres, multiply the inch value by 2.54. For example, a 3000 × 2000 pixel photo prints at 25.4 × 16.9 cm at 300 DPI; the same image at 150 DPI is twice as large but half as sharp.
Which DPI?
- 300 DPI: the standard for close-up professional print (business cards, brochures, menus, photos).
- 150 DPI: can suffice for large posters and work viewed from a distance.
- 72 DPI: screen only; inadequate for print.
Quality in Menu and Product Shoots
For café/restaurant menus, product catalogues and poster print, the image must have enough resolution; a low-resolution image blurs in print and lowers brand perception. For professional shoots of your menu and product visuals, see our product & menu photography and, for print-ready design, our corporate identity services.