## Conversion formula

The conversion factor from kilometers to miles is 0.62137119223733, which means that 1 kilometer is equal to 0.62137119223733 miles:

1 km = 0.62137119223733 mi

To convert 21 kilometers into miles we have to multiply 21 by the conversion factor in order to get the length amount from kilometers to miles. We can also form a simple proportion to calculate the result:

1 km → 0.62137119223733 mi

21 km → L(mi)

Solve the above proportion to obtain the length L in miles:

L(mi) = 21 km × 0.62137119223733 mi

L(mi) = 13.048795036984 mi

The final result is:

21 km → 13.048795036984 mi

We conclude that 21 kilometers is equivalent to 13.048795036984 miles:

21 kilometers = 13.048795036984 miles

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 mile is equal to 0.076635428571429 × 21 kilometers.

Another way is saying that 21 kilometers is equal to 1 ÷ 0.076635428571429 miles.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that twenty-one kilometers is approximately thirteen point zero four nine miles:

21 km ≅ 13.049 mi

An alternative is also that one mile is approximately zero point zero seven seven times twenty-one kilometers.

## Conversion table

### kilometers to miles chart

For quick reference purposes, below is the conversion table you can use to convert from kilometers to miles

kilometers (km) miles (mi)
22 kilometers 13.67 miles
23 kilometers 14.292 miles
24 kilometers 14.913 miles
25 kilometers 15.534 miles
26 kilometers 16.156 miles
27 kilometers 16.777 miles
28 kilometers 17.398 miles
29 kilometers 18.02 miles
30 kilometers 18.641 miles
31 kilometers 19.263 miles