To convert 21 cm to inches, you can use the following formula:
1 inch = 2.54 cm
So, to convert 21 cm to inches, you would divide 21 by 2.54:
21 cm / 2.54 = 8.27 inches
Therefore, 21 cm is equal to 8.27 inches.
Real-life example:
Let’s say you have a piece of paper that measures 21 cm in length. To convert this measurement to inches, you would divide 21 by 2.54:
21 cm / 2.54 = 8.27 inches
So, the length of the paper is 8.27 inches.
FAQs:
1. Why do we need to convert units?
Converting units allows us to easily compare measurements in different systems and make calculations more accurately.
2. Can I convert units using a calculator?
Yes, you can use a calculator to convert units by simply dividing the value by the conversion factor.
3. Is there a simple way to remember conversion factors?
One common trick is to remember that 1 inch is approximately equal to 2.54 cm, 1 foot is equal to 30.48 cm, and 1 meter is equal to 100 cm. This can help you quickly convert between units.