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 521 kilometers into miles we have to multiply 521 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

521 km → L_(mi)

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

L_(mi) = 521 km × 0.62137119223733 mi

L_(mi) = 323.73439115565 mi

The final result is:

521 km → 323.73439115565 mi

We conclude that 521 kilometers is equivalent to 323.73439115565 miles:

521 kilometers = 323.73439115565 miles

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 mile is equal to 0.0030889520153551 × 521 kilometers.

Another way is saying that 521 kilometers is equal to 1 ÷ 0.0030889520153551 miles.

Approximate result

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

521 km ≅ 323.734 mi

An alternative is also that one mile is approximately zero point zero zero three times five hundred 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