## 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 420 feet into kilometers we have to multiply 420 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

420 ft → L(km)

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

L(km) = 420 ft × 0.0003048 km

L(km) = 0.128016 km

The final result is:

420 ft → 0.128016 km

We conclude that 420 feet is equivalent to 0.128016 kilometers:

420 feet = 0.128016 kilometers

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 7.8115235595551 × 420 feet.

Another way is saying that 420 feet is equal to 1 ÷ 7.8115235595551 kilometers.

## Approximate result

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

420 ft ≅ 0.128 km

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

feet (ft) kilometers (km)
421 feet 0.128 kilometers
422 feet 0.129 kilometers
423 feet 0.129 kilometers
424 feet 0.129 kilometers
425 feet 0.13 kilometers
426 feet 0.13 kilometers
427 feet 0.13 kilometers
428 feet 0.13 kilometers
429 feet 0.131 kilometers
430 feet 0.131 kilometers