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 1688 feet into kilometers we have to multiply 1688 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

1688 ft → L_(km)

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

L_(km) = 1688 ft × 0.0003048 km

L_(km) = 0.5145024 km

The final result is:

1688 ft → 0.5145024 km

We conclude that 1688 feet is equivalent to 0.5145024 kilometers:

1688 feet = 0.5145024 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 1.943625530221 × 1688 feet.

Another way is saying that 1688 feet is equal to 1 ÷ 1.943625530221 kilometers.

Approximate result

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

1688 ft ≅ 0.515 km

An alternative is also that one kilometer is approximately one point nine four four times one thousand six hundred eighty-eight 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