To convert centimeters to millimeters, you need to know the basic conversion factor: 1 centimeter (cm) is equal to 10 millimeters (mm). Therefore, to find out how many millimeters are in 6 centimeters, you simply multiply 6 by 10.
Calculation: 6 cm × 10 = 60 mm
So, 6 centimeters is equal to 60 millimeters. This conversion is straightforward and is based on the metric system, which is widely used around the world for measurements.