Conversion formula

The conversion factor from centimeters to millimeters is 10, which means that 1 centimeter is equal to 10 millimeters:

1 cm = 10 mm

To convert 12 centimeters into millimeters we have to multiply 12 by the conversion factor in order to get the length amount from centimeters to millimeters. We can also form a simple proportion to calculate the result:

1 cm → 10 mm

12 cm → L_(mm)

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

L_(mm) = 12 cm × 10 mm

L_(mm) = 120 mm

The final result is:

12 cm → 120 mm

We conclude that 12 centimeters is equivalent to 120 millimeters:

12 centimeters = 120 millimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 millimeter is equal to 0.0083333333333333 × 12 centimeters.

Another way is saying that 12 centimeters is equal to 1 ÷ 0.0083333333333333 millimeters.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that twelve centimeters is approximately one hundred twenty millimeters:

12 cm ≅ 120 mm

An alternative is also that one millimeter is approximately zero point zero zero eight times twelve centimeters.

Conversion table

centimeters to millimeters chart

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