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 521 miles into kilometers we have to multiply 521 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

521 mi → L_(km)

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

L_(km) = 521 mi × 1.609344 km

L_(km) = 838.468224 km

The final result is:

521 mi → 838.468224 km

We conclude that 521 miles is equivalent to 838.468224 kilometers:

521 miles = 838.468224 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 0.0011926510407626 × 521 miles.

Another way is saying that 521 miles is equal to 1 ÷ 0.0011926510407626 kilometers.

Approximate result

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

521 mi ≅ 838.468 km

An alternative is also that one kilometer is approximately zero point zero zero one times five hundred twenty-one 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