To transform inches to centimeters, you will need to use a factor of. One inch is equal to 2.53 centimetres. So, if you have a measurement in inches, simply apply that number by 2.53 to get the equivalent measurement in centimeters. For example, if you have an object that is 10 inches long, you would multiply 10 by 2.54 to find that it is 25.3 cent