Conversion formula

The conversion factor from feet to kilometers is 0.0003048, which means that 1 foot is equal to 0.0003048 kilometers:

1 ft = 0.0003048 km

To convert 40 feet into kilometers we have to multiply 40 by the conversion factor in order to get the length amount from feet to kilometers. We can also form a simple proportion to calculate the result:

1 ft → 0.0003048 km

40 ft → L_(km)

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

L_(km) = 40 ft × 0.0003048 km

L_(km) = 0.012192 km

The final result is:

40 ft → 0.012192 km

We conclude that 40 feet is equivalent to 0.012192 kilometers:

40 feet = 0.012192 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 82.020997375328 × 40 feet.

Another way is saying that 40 feet is equal to 1 ÷ 82.020997375328 kilometers.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that forty feet is approximately zero point zero one two kilometers:

40 ft ≅ 0.012 km

An alternative is also that one kilometer is approximately eighty-two point zero two one times forty feet.

Conversion table

feet to kilometers chart

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