mm to inches (Millimeters to In)

inches to mm (Swap Units)


Note: Fractional results are rounded to the nearest 1/64. For a more accurate answer please select 'decimal' from the options above the result.

Note: You can increase or decrease the accuracy of this answer by selecting the number of significant figures required from the options above the result.

Note: For a pure decimal result please select 'decimal' from the options above the result.

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Millimeters to Inches formula

in =
mm * 0.039370
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More information: Millimeters
More information: Inches


The millimetre is a unit of length in the metric system, equivalent to one thousandth of a metre (the SI base unit of length).

One meter was defined in 1983 by the 17th conference of weights and measures as “the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second” and the millimetre by definition is derived as being 1/1000th of that value.


Millimeters to Inches formula

in =
mm * 0.039370


The inch is a unit of length used primarily in the imperial and U.S. customary measurement systems, representing 1/12 of a foot and 1/36 of a yard.


Millimeters to Inches table

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< Smaller Values Larger Values >
Millimeters Inches
0mm 0.00in
1mm 0.04in
2mm 0.08in
3mm 0.12in
4mm 0.16in
5mm 0.20in
6mm 0.24in
7mm 0.28in
8mm 0.31in
9mm 0.35in
10mm 0.39in
11mm 0.43in
12mm 0.47in
13mm 0.51in
14mm 0.55in
15mm 0.59in
16mm 0.63in
17mm 0.67in
18mm 0.71in
19mm 0.75in
Millimeters Inches
20mm 0.79in
21mm 0.83in
22mm 0.87in
23mm 0.91in
24mm 0.94in
25mm 0.98in
26mm 1.02in
27mm 1.06in
28mm 1.10in
29mm 1.14in
30mm 1.18in
31mm 1.22in
32mm 1.26in
33mm 1.30in
34mm 1.34in
35mm 1.38in
36mm 1.42in
37mm 1.46in
38mm 1.50in
39mm 1.54in
Millimeters Inches
40mm 1.57in
41mm 1.61in
42mm 1.65in
43mm 1.69in
44mm 1.73in
45mm 1.77in
46mm 1.81in
47mm 1.85in
48mm 1.89in
49mm 1.93in
50mm 1.97in
51mm 2.01in
52mm 2.05in
53mm 2.09in
54mm 2.13in
55mm 2.17in
56mm 2.20in
57mm 2.24in
58mm 2.28in
59mm 2.32in