Conversion formula

The conversion factor from miles to kilometers is 1.609344, which means that 1 mile is equal to 1.609344 kilometers:

1 mi = 1.609344 km

To convert 138 miles into kilometers we have to multiply 138 by the conversion factor in order to get the length amount from miles to kilometers. We can also form a simple proportion to calculate the result:

1 mi → 1.609344 km

138 mi → L_(km)

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

L_(km) = 138 mi × 1.609344 km

L_(km) = 222.089472 km

The final result is:

138 mi → 222.089472 km

We conclude that 138 miles is equivalent to 222.089472 kilometers:

138 miles = 222.089472 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 0.0045026897988213 × 138 miles.

Another way is saying that 138 miles is equal to 1 ÷ 0.0045026897988213 kilometers.

Approximate result

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

138 mi ≅ 222.089 km

An alternative is also that one kilometer is approximately zero point zero zero five times one hundred thirty-eight miles.

Conversion table

miles to kilometers chart

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