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 320 millimeters into decimeters we have to multiply 320 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

320 mm → L_(dm)

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

L_(dm) = 320 mm × 0.01 dm

L_(dm) = 3.2 dm

The final result is:

320 mm → 3.2 dm

We conclude that 320 millimeters is equivalent to 3.2 decimeters:

320 millimeters = 3.2 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.3125 × 320 millimeters.

Another way is saying that 320 millimeters is equal to 1 ÷ 0.3125 decimeters.

Approximate result

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

320 mm ≅ 3.2 dm

An alternative is also that one decimeter is approximately zero point three one three times three hundred twenty 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