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 840 feet into inches we have to multiply 840 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

840 ft → L_(in)

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

L_(in) = 840 ft × 12 in

L_(in) = 10080 in

The final result is:

840 ft → 10080 in

We conclude that 840 feet is equivalent to 10080 inches:

840 feet = 10080 inches

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 inch is equal to 9.9206349206349E-5 × 840 feet.

Another way is saying that 840 feet is equal to 1 ÷ 9.9206349206349E-5 inches.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that eight hundred forty feet is approximately ten thousand eighty inches:

840 ft ≅ 10080 in

An alternative is also that one inch is approximately zero times eight hundred forty 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