To convert centimeters to inches, you can use the conversion factor that 1 inch is equal to 2.54 centimeters. Therefore, to find out how many inches are in 21 centimeters, you can use the following calculation:
1. Start with the measurement in centimeters: 21 cm.
2. Use the conversion factor: 1 inch = 2.54 cm.
3. To find the number of inches, divide the number of centimeters by the conversion factor:
Inches = centimeters / conversion factor
So, you will calculate:
Inches = 21 cm / 2.54 cm/inch = 8.2677 inches
4. Rounding this to two decimal places, you get:
8.27 inches
Thus, 21 centimeters is approximately equal to 8.27 inches.
Knowing this conversion can be very helpful in various situations, such as when you are dealing with measurements in different systems or trying to understand the size of an object when it’s given in centimeters.