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 315 millimeters into decimeters we have to multiply 315 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

315 mm → L_(dm)

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

L_(dm) = 315 mm × 0.01 dm

L_(dm) = 3.15 dm

The final result is:

315 mm → 3.15 dm

We conclude that 315 millimeters is equivalent to 3.15 decimeters:

315 millimeters = 3.15 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.31746031746032 × 315 millimeters.

Another way is saying that 315 millimeters is equal to 1 ÷ 0.31746031746032 decimeters.

Approximate result

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

315 mm ≅ 3.15 dm

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