Convert mm to inch

The calculator allows you to convert mm to inches.

Perform the reverse calculation: convert inches to millimeters

1 mm = 1 / 25.4 inch or approximately 0.03937 inch
1 inch = 25.4 mm

To convert millimeters to inches, multiply by 0.03937 (approximately) or divide by 25.4.

Example

We are going to convert a distance d of 180 millimeters to inches.
Distance d = 180 millimeters
1 mm = 1 / 25.4 inch
d = 180 mm = 180 / 25.4 = 7.09 inches = 7.09"

Inch

The inch is a unit of length.
The symbol for inch is the double prime: ". "5 inches" is written 5".
The correct use of the double prime is to indicate the unit of measure inches: 5” (five inches)
Another symbol for the unit of measurement "inch" is "in".
The plural of "inch" is "inches".

Millimeters to inches chart

Convert de mm to inches:

1 mm = 0.04"
10 mm = 0.39"
20 mm = 0.79"
30 mm = 1.18"
40 mm = 1.58"
50 mm = 1.96"
60 mm = 2.36"
70 mm = 2.76"
80 mm = 3.14"
90 mm = 3.54"
100 mm = 3.94"

A inch is a unit of measure equal to one twelfth (1/12th) of a foot (2.54 cm).

The inch is used to measure for example:
- wheel sizes and vehicle tire sizes
- the dimensions of screens
- the sizes of electronic components,
- the resolution of printers and scanners expressed in dots per inch (dots per inch = DPI)

To go further

Dots per inch (DPI) is a measure of the resolution of a printed document or digital scan. Dots per inch is a measure of spatial resolution of printers. DPI (dots per inch) describes the amount of ink dots on a printed image. It refers to the number of printed dots contained within one inch of an image printed by a printer.

Pixels per inch (PPI) describes the resolution in pixels of a digital image. It refers to the number of pixels contained within one inch of an image displayed on a computer monitor.