People in the U.S. are accustomed to using inches to measure small distances. But it is often necessary to convert these units to metric units. Centimeters are the closest unit of measure to the inch, and converting between the two is second nature for those who work in scientific fields. Calculating how many centimeters are in an inch requires only a simple math equation.

Establish the number of inches that you are going to convert to centimeters.

Multiply the amount of inches times 2.54. For example, if you want to convert 7 inches to centimeters, so you multiply 7 by 2.54 to get 17.78. That means that 7 inches is equal to 17.78 cm.

Check your work by dividing the result by 2.54. If you arrive at your original number of inches, then you have properly done your work.