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 138.4 feet into decimeters we have to multiply 138.4 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

138.4 ft → L_(dm)

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

L_(dm) = 138.4 ft × 3.048 dm

L_(dm) = 421.8432 dm

The final result is:

138.4 ft → 421.8432 dm

We conclude that 138.4 feet is equivalent to 421.8432 decimeters:

138.4 feet = 421.8432 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.0023705490570904 × 138.4 feet.

Another way is saying that 138.4 feet is equal to 1 ÷ 0.0023705490570904 decimeters.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that one hundred thirty-eight point four feet is approximately four hundred twenty-one point eight four three decimeters:

138.4 ft ≅ 421.843 dm

An alternative is also that one decimeter is approximately zero point zero zero two times one hundred thirty-eight point four 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