# 100 millimeters in decimeters

## Conversion

100 millimeters is equivalent to 1 decimeters.

## Conversion formula How to convert 100 millimeters to decimeters?

We know (by definition) that: $1\mathrm{mm}=0.01\mathrm{dm}$

We can set up a proportion to solve for the number of decimeters.

$1 ⁢ mm 100 ⁢ mm = 0.01 ⁢ dm x ⁢ dm$

Now, we cross multiply to solve for our unknown $x$:

$x\mathrm{dm}=\frac{100\mathrm{mm}}{1\mathrm{mm}}*0.01\mathrm{dm}\to x\mathrm{dm}=1.0\mathrm{dm}$

Conclusion: $100 ⁢ mm = 1.0 ⁢ dm$ ## Conversion in the opposite direction

The inverse of the conversion factor is that 1 decimeter is equal to 1 times 100 millimeters.

It can also be expressed as: 100 millimeters is equal to $\frac{1}{1}$ decimeters.

## Approximation

An approximate numerical result would be: one hundred millimeters is about zero decimeters, or alternatively, a decimeter is about zero times one hundred millimeters.

## Footnotes

 The precision is 15 significant digits (fourteen digits to the right of the decimal point).

Results may contain small errors due to the use of floating point arithmetic.