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 721 feet into kilometers we have to multiply 721 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

721 ft → L_(km)

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

L_(km) = 721 ft × 0.0003048 km

L_(km) = 0.2197608 km

The final result is:

721 ft → 0.2197608 km

We conclude that 721 feet is equivalent to 0.2197608 kilometers:

721 feet = 0.2197608 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 4.5504020735272 × 721 feet.

Another way is saying that 721 feet is equal to 1 ÷ 4.5504020735272 kilometers.

Approximate result

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

721 ft ≅ 0.22 km

An alternative is also that one kilometer is approximately four point five five times seven hundred twenty-one 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