## 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 21 feet into inches we have to multiply 21 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

21 ft → L(in)

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

L(in) = 21 ft × 12 in

L(in) = 252 in

The final result is:

21 ft → 252 in

We conclude that 21 feet is equivalent to 252 inches:

21 feet = 252 inches

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 inch is equal to 0.003968253968254 × 21 feet.

Another way is saying that 21 feet is equal to 1 ÷ 0.003968253968254 inches.

## Approximate result

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

21 ft ≅ 252 in

An alternative is also that one inch is approximately zero point zero zero four times twenty-one 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

feet (ft) inches (in)
22 feet 264 inches
23 feet 276 inches
24 feet 288 inches
25 feet 300 inches
26 feet 312 inches
27 feet 324 inches
28 feet 336 inches
29 feet 348 inches
30 feet 360 inches
31 feet 372 inches