Multiply cm by 0.3937007874 to get in. The displayed factor is rounded; the calculator uses the full stored conversion factor.
One inch is exactly 2.54 centimeters. Decimal inches are not feet-and-inches notation.
Worked example
30 cm = 11.811023622 in. To reverse it, enter the unrounded output and select Swap units. Round only the final result; converting an already-rounded result back may not reproduce the original exactly.
Conversion table in both directions
cm and in reference values
Input
cm → in
in → cm
1
0.3937007874
2.54
2
0.7874015748
5.08
5
1.968503937
12.7
10
3.937007874
25.4
20
7.874015748
50.8
25
9.842519685
63.5
50
19.6850393701
127
100
39.3700787402
254
500
196.8503937008
1,270
1000
393.7007874016
2,540
Last updated . Results are estimates for informational purposes only.