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 4200 feet into kilometers we have to multiply 4200 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

4200 ft → L_(km)

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

L_(km) = 4200 ft × 0.0003048 km

L_(km) = 1.28016 km

The final result is:

4200 ft → 1.28016 km

We conclude that 4200 feet is equivalent to 1.28016 kilometers:

4200 feet = 1.28016 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 0.78115235595551 × 4200 feet.

Another way is saying that 4200 feet is equal to 1 ÷ 0.78115235595551 kilometers.

Approximate result

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

4200 ft ≅ 1.28 km

An alternative is also that one kilometer is approximately zero point seven eight one times four thousand two hundred 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