21 km to miles

To convert kilometers to miles, you can use the conversion factor of 1 kilometer equals 0.621371 miles. Here are the step-by-step instructions to convert 21 kilometers to miles:

Step 1: Write down the given value:
21 kilometers

Step 2: Set up the conversion factor:
1 kilometer = 0.621371 miles

Step 3: Multiply the given value by the conversion factor:
21 kilometers * 0.621371 miles/kilometer

Step 4: Perform the multiplication:
21 * 0.621371 = 13.048791 miles

Step 5: Round the result to an appropriate number of decimal places:
Since miles are typically rounded to two decimal places, the final answer is:
21 kilometers is approximately equal to 13.05 miles.

Therefore, 21 kilometers is approximately equal to 13.05 miles.