Conversion between PX pixels, pt points, cm centimeters, mm millimeters

Pixel px and centimeters how to convert
Pixels, as a dimension of an image, exist only in the computer, as in the case of RGB color mode. Pixels are a virtual unit, and in real life there is no pixel in this unit. In reality we see a person, can you say he has how many pixels high? No, usually we'll say he's 1.82 meters tall, or 182 centimeters. The traditional length units are used. The so-called traditional length unit refers to the millimeter, centimeter, centimeter, meter, kilometer, light-year such units.

Px
Relative length units. Pixels (Pixel).
Pixels are relative to the display screen resolution. For example, the resolution used by wondows users is typically 96 pixels per inch. The resolution used by Mac users is typically 72 pixels per inch.

Em
Relative length units. The font size relative to the text within the current object.
If the font size of the current inline text is not artificially set, the default font size is relative to the browser.

Ex
Relative length units. The height relative to the character "X". This height is usually half the size of the font.
If the font size of the current inline text is not artificially set, the default font size is relative to the browser.

Pt
Absolute length units. Point.
1in = 2.54cm = 25.4 mm = 72PT = 6pc

Pc
Absolute length units. Picas (Pica). Equivalent to the size of our new No. fourth.
1in = 2.54cm = 25.4 mm = 72PT = 6pc

Inch
Absolute length units. inches (inch).
1in = 2.54cm = 25.4 mm = 72PT = 6pc

Mm
Absolute length units. MM (millimeter).
1in = 2.54cm = 25.4 mm = 72PT = 6pc

Cm
Absolute length units. CM (centimeter).
1in = 2.54cm = 25.4 mm = 72PT = 6pc

Conversion between PX pixels, pt points, cm centimeters, mm millimeters