Conversion formula

The conversion factor from millimeters to decimeters is 0.01, which means that 1 millimeter is equal to 0.01 decimeters:

1 mm = 0.01 dm

To convert 380 millimeters into decimeters we have to multiply 380 by the conversion factor in order to get the length amount from millimeters to decimeters. We can also form a simple proportion to calculate the result:

1 mm → 0.01 dm

380 mm → L_(dm)

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

L_(dm) = 380 mm × 0.01 dm

L_(dm) = 3.8 dm

The final result is:

380 mm → 3.8 dm

We conclude that 380 millimeters is equivalent to 3.8 decimeters:

380 millimeters = 3.8 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.26315789473684 × 380 millimeters.

Another way is saying that 380 millimeters is equal to 1 ÷ 0.26315789473684 decimeters.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that three hundred eighty millimeters is approximately three point eight decimeters:

380 mm ≅ 3.8 dm

An alternative is also that one decimeter is approximately zero point two six three times three hundred eighty millimeters.

Conversion table

millimeters to decimeters chart

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