DPI: 300 dpi inkjet 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)
162.56 mm x 91.44 mm = 14864.49 mm2aspect ratio: 1.778 (diagonal: 186.51 mm)
16.26 cm x 9.14 cm = 148.62 cm2aspect ratio: 1.779 (diagonal: 18.65 cm)
6.4 inch x 3.6 inch = 23.04 inch2aspect ratio: 1.778 (diagonal: 7.34 inch)

Print Pixel Size

Dots-per-inch
Printer resolution = 300 dpi = 118 dots/cm
Printer pitch = 85 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