DPI calculator: Photo 10 x 15

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)
254 mm x 381 mm = 96774 mm2 (diagonal: 457.91 mm)
25.4 cm x 38.1 cm = 967.74 cm2 (diagonal: 45.79 cm)
10 inch x 15 inch = 150 inch2 (diagonal: 18.03 inch)
0.83 feet x 1.25 feet = 1.04 feet2 (diagonal: 1.5 feet)

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)
3000 px x 4500 px = 13.5 megapixels
= aspect ratio 0.667

Some examples