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 318 millimeters into decimeters we have to multiply 318 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

318 mm → L_(dm)

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

L_(dm) = 318 mm × 0.01 dm

L_(dm) = 3.18 dm

The final result is:

318 mm → 3.18 dm

We conclude that 318 millimeters is equivalent to 3.18 decimeters:

318 millimeters = 3.18 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.31446540880503 × 318 millimeters.

Another way is saying that 318 millimeters is equal to 1 ÷ 0.31446540880503 decimeters.

Approximate result

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

318 mm ≅ 3.18 dm

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