How many inches are in one centimeter?

One centimeter is equivalent to approximately 0.39 inches. This conversion factor is derived from the relationship between the metric system and the imperial system. Specifically, one inch is defined as exactly 2.54 centimeters. To find out how many inches are in one centimeter, you can use the formula:

[ \text{inches} = \text{centimeters} \div 2.54 ]

By substituting one centimeter in the formula, you get:

[ \text{inches} = 1 \div 2.54 \approx 0.39 ]

Thus, the conversion factor of 0.39 accurately represents the number of inches in one centimeter, making this the correct answer. Understanding this conversion is important for various applications, such as when converting measurements in fields like science, engineering, and everyday life.