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 821 feet into kilometers we have to multiply 821 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

821 ft → L_(km)

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

L_(km) = 821 ft × 0.0003048 km

L_(km) = 0.2502408 km

The final result is:

821 ft → 0.2502408 km

We conclude that 821 feet is equivalent to 0.2502408 kilometers:

821 feet = 0.2502408 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 3.9961509074459 × 821 feet.

Another way is saying that 821 feet is equal to 1 ÷ 3.9961509074459 kilometers.

Approximate result

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

821 ft ≅ 0.25 km

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