9 millimeters in decimeters

Result

The conversion result is: 9 millimeters is equivalent to 0.09 decimeters.^[1]

Conversion formula
How to convert 9 millimeters to decimeters?

We know (by definition) that: 1 mm = 0.01 dm.

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

1 mm / 9 mm = 0.01 dm / x dm

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

x dm = (9 mm / 1 mm) * 0.01 dm → x dm = 0.09 dm

Conclusion:

9 mm = 0.09 dm

Conversion in the opposite direction

The inverse of the conversion factor is that 1 decimeter is equal to 11.1111111111111 times 9 millimeters.

It can also be expressed as: 9 millimeters is equal to 1 / 11.1111111111111 decimeters.

Approximation

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