To convert millimeters to inches, we use the conversion factor where 1 inch is equal to 25.4 millimeters. To find out how many inches are in 100 millimeters, we can use the following calculation:
100 mm ÷ 25.4 mm/inch = 3.937 inches
So, 100 millimeters is approximately 3.937 inches. This measurement is often rounded to 3.94 inches for simplicity. Understanding this conversion is useful in various situations, such as when you are working with measurements in different systems or trying to compare sizes.