DPI: ISO A3 poster

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)
297 mm x 420 mm = 124740 mm2aspect ratio: 0.707 (diagonal: 514.4 mm)
29.7 cm x 42 cm = 1247.4 cm2aspect ratio: 0.707 (diagonal: 51.44 cm)
11.69 inch x 16.54 inch = 193.35 inch2aspect ratio: 0.707 (diagonal: 20.25 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)
3507 px x 4962 px = 17.4 megapixels
= aspect ratio 0.707

Some examples

References

  • Dots per inch
  • Bleed (printing)