Conversion formula

The conversion factor from kilometers to feet is 3280.8398950131, which means that 1 kilometer is equal to 3280.8398950131 feet:

1 km = 3280.8398950131 ft

To convert 42.1 kilometers into feet we have to multiply 42.1 by the conversion factor in order to get the length amount from kilometers to feet. We can also form a simple proportion to calculate the result:

1 km → 3280.8398950131 ft

42.1 km → L_(ft)

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

L_(ft) = 42.1 km × 3280.8398950131 ft

L_(ft) = 138123.35958005 ft

The final result is:

42.1 km → 138123.35958005 ft

We conclude that 42.1 kilometers is equivalent to 138123.35958005 feet:

42.1 kilometers = 138123.35958005 feet

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 foot is equal to 7.2399049881235E-6 × 42.1 kilometers.

Another way is saying that 42.1 kilometers is equal to 1 ÷ 7.2399049881235E-6 feet.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that forty-two point one kilometers is approximately one hundred thirty-eight thousand one hundred twenty-three point three six feet:

42.1 km ≅ 138123.36 ft

An alternative is also that one foot is approximately zero times forty-two point one kilometers.

Conversion table

kilometers to feet chart

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