Conversion formula

The conversion factor from decimeters to millimeters is 100, which means that 1 decimeter is equal to 100 millimeters:

1 dm = 100 mm

To convert 342 decimeters into millimeters we have to multiply 342 by the conversion factor in order to get the length amount from decimeters to millimeters. We can also form a simple proportion to calculate the result:

1 dm → 100 mm

342 dm → L_(mm)

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

L_(mm) = 342 dm × 100 mm

L_(mm) = 34200 mm

The final result is:

342 dm → 34200 mm

We conclude that 342 decimeters is equivalent to 34200 millimeters:

342 decimeters = 34200 millimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 millimeter is equal to 2.9239766081871E-5 × 342 decimeters.

Another way is saying that 342 decimeters is equal to 1 ÷ 2.9239766081871E-5 millimeters.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that three hundred forty-two decimeters is approximately thirty-four thousand two hundred millimeters:

342 dm ≅ 34200 mm

An alternative is also that one millimeter is approximately zero times three hundred forty-two decimeters.

Conversion table

decimeters to millimeters chart

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