Inches to Centimeters (in to cm)


cm to inches (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.

Show formula

Inches to Centimeters formula

cm =
Show working
Show result in exponential format
More information: Inches
More information: Centimeters


Use of the inch can be traced back as far as the 7th century. The first explicit definition we could find of its length was after 1066 when it was defined as the length of three barleycorns. This was not a satisfactory reference as barleycorn lengths vary naturally. The British Standards Institute defined the inch as 25.4mm in 1930 in the document "Metric Units in Engineering: Going SI". In March 1932 the American Standards Association were asked to rule on whether to adopt the same value (at the time the American inch was 1/.03937 mm which approximated to 25.400051 mm). Because the values were so close, and because Britain has already settled on that value, the ASA adopted this value on March 13, 1933.


Inches to Centimeters formula

cm =


The centimetre is a unit of length in the metric system, equal to one-hundredth of a metre.

1cm is equivalent to 0.39370 inches.


Inches to Centimeters table

Print table
< Smaller Values Larger Values >
Inches Centimeters
0in 0.00cm
1in 2.54cm
2in 5.08cm
3in 7.62cm
4in 10.16cm
5in 12.70cm
6in 15.24cm
7in 17.78cm
8in 20.32cm
9in 22.86cm
10in 25.40cm
11in 27.94cm
12in 30.48cm
13in 33.02cm
14in 35.56cm
15in 38.10cm
16in 40.64cm
17in 43.18cm
18in 45.72cm
19in 48.26cm
Inches Centimeters
20in 50.80cm
21in 53.34cm
22in 55.88cm
23in 58.42cm
24in 60.96cm
25in 63.50cm
26in 66.04cm
27in 68.58cm
28in 71.12cm
29in 73.66cm
30in 76.20cm
31in 78.74cm
32in 81.28cm
33in 83.82cm
34in 86.36cm
35in 88.90cm
36in 91.44cm
37in 93.98cm
38in 96.52cm
39in 99.06cm
Inches Centimeters
40in 101.60cm
41in 104.14cm
42in 106.68cm
43in 109.22cm
44in 111.76cm
45in 114.30cm
46in 116.84cm
47in 119.38cm
48in 121.92cm
49in 124.46cm
50in 127.00cm
51in 129.54cm
52in 132.08cm
53in 134.62cm
54in 137.16cm
55in 139.70cm
56in 142.24cm
57in 144.78cm
58in 147.32cm
59in 149.86cm