10 mm berapa cmHow to Convert Inch to Centimeter. 1 in = 2.54 cm 1 cm = 0.3937007874 in. Example: convert 15 in to cm: 15 in = 15 × 2.54 cm = 38.1 cm. Popular Length Unit Conversions1 Inci = 25.4 Milimeter: 10 Inci = 254 Milimeter: 2500 Inci = 63500 Milimeter: 2 Inci = 50.8 Milimeter: 20 Inci = 508 Milimeter: 5000 Inci = 127000 Milimeter: 3 Inci = 76.2 Milimeter: 30