转换公式：毫米转英寸，英寸乘以DPI(每英寸点数)
1英寸 = 2.54 厘米 = 25.4 毫米
例子(600dpi)：mm: 210x297 = px: 4961(210/25.4*600)x7016(297/25.4*600)
Home > Paper Dimensions > A4 Paper Dimensions in Pixels
A4 Paper Size in Pixels Because the size of paper varies depending on the Pixels Per Inch of the setting in Photoshop, there is no defined size for A4 paper in Photoshop or MS Paint. Instead, The table below displays the dimensions of A4 paper in pixels at different Pixels Per Inch (PPI or Dots Per Inch). Each pixel count is in 8 bits of colour. You can change the color mode in Photoshop when creating a new project.
Paper Size Type
Paper Width
Paper Height
A4 Dimensions @ 72 DPI
595 Pixels
842 Pixels
A4 Dimensions @ 200 DPI
1654 Pixels
2339 Pixels
A4 Dimensions @ 300 DPI
2480 Pixels
3508 Pixels
A4 Dimensions @ 400 DPI
3307 Pixels
4677 Pixels
A4 Dimensions @ 600 DPI
4961 Pixels
7016 Pixels
A4 Dimensions @ 1200 DPI
9921 Pixels
14031 Pixels
Letter Size @ 72 DPI
612 Pixels
792 Pixels
Letter Size @ 200 DPI
1700 Pixels
2200 Pixels
Letter Size @ 300 DPI
2550 Pixels
3300 Pixels
Letter Size @ 400 DPI
3400 Pixels
4400 Pixels
Letter Size @ 600 DPI
5100 Pixels
6600 Pixels
Letter Size @ 1200 DPI
10200 Pixels
13200 Pixels
Letter size: Canada and the United States of America.A4 size in mm: United Kingdom, Australia, Germany, Singapore, India, United Arab Emirates, Philippines, New Zealand and nearly ever other country in the world.
MM
Inches
CM
Pixels
What are Pixels?
Pixels are not used for measuring size. One pixel is a small dot of illumination on a display screen. Multiple pixel dots compose an image. This is why Dots Per Inch or Pixels Per Inch is used as a standard. Pixels are most standardised as 8bit in colour in 24bit displays. Each pixel can achieve over 16 million colours in this case.
How many Pixels of Bleed for Photoshop?Adding a bleed to Photoshop is as easy as increasing how many pixels surround the space you want to work with. The area surrounding your workspace in Photoshop should always have a bleed of at least 3 millimeters to adjust for printing errors with it goes on paper. But we, and many others, recommend 5 millimeters to adjust for a wider variety of printers.