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 840 feet into kilometers we have to multiply 840 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

840 ft → L_(km)

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

L_(km) = 840 ft × 0.0003048 km

L_(km) = 0.256032 km

The final result is:

840 ft → 0.256032 km

We conclude that 840 feet is equivalent to 0.256032 kilometers:

840 feet = 0.256032 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 3.9057617797775 × 840 feet.

Another way is saying that 840 feet is equal to 1 ÷ 3.9057617797775 kilometers.

Approximate result

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

840 ft ≅ 0.256 km

An alternative is also that one kilometer is approximately three point nine zero six times eight hundred 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