Conversion formula

The conversion factor from feet to inches is 12, which means that 1 foot is equal to 12 inches:

1 ft = 12 in

To convert 1685 feet into inches we have to multiply 1685 by the conversion factor in order to get the length amount from feet to inches. We can also form a simple proportion to calculate the result:

1 ft → 12 in

1685 ft → L_(in)

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

L_(in) = 1685 ft × 12 in

L_(in) = 20220 in

The final result is:

1685 ft → 20220 in

We conclude that 1685 feet is equivalent to 20220 inches:

1685 feet = 20220 inches

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 inch is equal to 4.9455984174085E-5 × 1685 feet.

Another way is saying that 1685 feet is equal to 1 ÷ 4.9455984174085E-5 inches.

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-five feet is approximately twenty thousand two hundred twenty inches:

1685 ft ≅ 20220 in

An alternative is also that one inch is approximately zero times one thousand six hundred eighty-five feet.

Conversion table

feet to inches chart

For quick reference purposes, below is the conversion table you can use to convert from feet to inches