Conversion formula

The conversion factor from feet to decimeters is 3.048, which means that 1 foot is equal to 3.048 decimeters:

1 ft = 3.048 dm

To convert 21 feet into decimeters we have to multiply 21 by the conversion factor in order to get the length amount from feet to decimeters. We can also form a simple proportion to calculate the result:

1 ft → 3.048 dm

21 ft → L_(dm)

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

L_(dm) = 21 ft × 3.048 dm

L_(dm) = 64.008 dm

The final result is:

21 ft → 64.008 dm

We conclude that 21 feet is equivalent to 64.008 decimeters:

21 feet = 64.008 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.01562304711911 × 21 feet.

Another way is saying that 21 feet is equal to 1 ÷ 0.01562304711911 decimeters.

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 sixty-four point zero zero eight decimeters:

21 ft ≅ 64.008 dm

An alternative is also that one decimeter is approximately zero point zero one six times twenty-one feet.

Conversion table

feet to decimeters chart

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