Unit conversion is the process of changing a measurement from one unit to another. This is often necessary in fields like science, engineering, and everyday life, where different systems of measurement are used. For example, converting from meters to feet or from liters to gallons helps ensure accurate communication and understanding of quantities. To perform a unit conversion, you typically use a conversion factor, which is a ratio that expresses how many of one unit are equal to another. For instance, the conversion factor between inches and centimeters is 2.54, meaning one inch is equal to 2.54 centimeters. By multiplying the original measurement by the conversion factor, you can easily find the equivalent value in the desired unit.