Taishan Office Technology Lecture: page width, height, size and source, and the conversion relationship between inches, centimeters and DPI

Today, I studied the related concepts carefully .

• standard DPI yes 72

I don't know how to get here . It seems to be converted from the previous monitor .

• WINDOWS DPI yes 96

Why should it become a standard DPI Of 4/3, Unclear .

• 1 Inch =2.54 centimeter

After preliminary investigation , This is a precise definition .

• A4 The physical width and height are 21 centimeter 、29.7 centimeter .
• A4 The width and height of floating-point pixels are ：793.7、1122.52
• WORD The width and height of integer pixels are ：793、1122
• WORD Zoom in to 2 times ,1587,2245.

If it is rounded , Should be 794. Is the calculation error , Still use truncated ？ Zoom in to 2 times , The width becomes 1587. Compare the , It can be concluded that the truncation method is adopted .