DPI: 600 dpi laser printer

Use this calculator to find out how many pixels (resolution) an image should have to be printed at a certain size.

Print Dimensions

Net dimensions (no bleed)
81.28 mm x 45.72 mm = 3716.12 mm2aspect ratio: 1.778 (diagonal: 93.26 mm)
8.13 cm x 4.57 cm = 37.15 cm2aspect ratio: 1.779 (diagonal: 9.33 cm)
3.2 inch x 1.8 inch = 5.76 inch2aspect ratio: 1.778 (diagonal: 3.67 inch)

Print Pixel Size

Dots-per-inch
Printer resolution = 600 dpi = 236 dots/cm
Printer pitch = 42 µm / micrometer (size of 1 pixel)
Net dimensions (no bleed)
1920 px x 1080 px = 2.1 megapixels
= aspect ratio 1.778

Some examples

References