DPI calculator: US Letter

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)
215.9 mm x 279.4 mm = 60322.46 mm2 (diagonal: 353.1 mm)
21.59 cm x 27.94 cm = 603.22 cm2 (diagonal: 35.31 cm)
8.5 inch x 11 inch = 93.5 inch2 (diagonal: 13.9 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)
2550 px x 3300 px = 8.4 megapixels
= aspect ratio 0.773

Some examples