Pixel-tips

  pixel 数

計算式

N x dip / 25.4 = Pixel 

A4

A4 = 297mm x 210mm

dpi	size
72 dpi	842px x 595px
300dpi	3508px x 2480px
600dpi	7016px x 4961px
1200dpi

http://www.size-info.com/pixel/