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 170 millimeters into decimeters we have to multiply 170 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

170 mm → L_(dm)

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

L_(dm) = 170 mm × 0.01 dm

L_(dm) = 1.7 dm

The final result is:

170 mm → 1.7 dm

We conclude that 170 millimeters is equivalent to 1.7 decimeters:

170 millimeters = 1.7 decimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 decimeter is equal to 0.58823529411765 × 170 millimeters.

Another way is saying that 170 millimeters is equal to 1 ÷ 0.58823529411765 decimeters.

Approximate result

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

170 mm ≅ 1.7 dm

An alternative is also that one decimeter is approximately zero point five eight eight times one hundred seventy 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