9 millimeters in centimeters

Result

The conversion result is: 9 millimeters is equivalent to 0.9 centimeters.^[1]

Conversion formula
How to convert 9 millimeters to centimeters?

We know (by definition) that: 1 mm = 0.1 cm.

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

1 mm / 9 mm = 0.1 cm / x cm

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

x cm = (9 mm / 1 mm) * 0.1 cm → x cm = 0.9 cm

Conclusion:

9 mm = 0.9 cm

Conversion in the opposite direction

The inverse of the conversion factor is that 1 centimeter is equal to 1.11111111111111 times 9 millimeters.

It can also be expressed as: 9 millimeters is equal to 1 / 1.11111111111111 centimeters.

Approximation

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