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 1820 feet into inches we have to multiply 1820 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

1820 ft → L_(in)

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

L_(in) = 1820 ft × 12 in

L_(in) = 21840 in

The final result is:

1820 ft → 21840 in

We conclude that 1820 feet is equivalent to 21840 inches:

1820 feet = 21840 inches

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 inch is equal to 4.5787545787546E-5 × 1820 feet.

Another way is saying that 1820 feet is equal to 1 ÷ 4.5787545787546E-5 inches.

Approximate result

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

1820 ft ≅ 21840 in

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