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 6.4 centimeters into millimeters we have to multiply 6.4 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

6.4 cm → L(mm)

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

L(mm) = 6.4 cm × 10 mm

L(mm) = 64 mm

The final result is:

6.4 cm → 64 mm

We conclude that 6.4 centimeters is equivalent to 64 millimeters:

6.4 centimeters = 64 millimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 millimeter is equal to 0.015625 × 6.4 centimeters.

Another way is saying that 6.4 centimeters is equal to 1 ÷ 0.015625 millimeters.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six point four centimeters is approximately sixty-four millimeters:

6.4 cm ≅ 64 mm

An alternative is also that one millimeter is approximately zero point zero one six times six point four 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

centimeters (cm) millimeters (mm)
7.4 centimeters 74 millimeters
8.4 centimeters 84 millimeters
9.4 centimeters 94 millimeters
10.4 centimeters 104 millimeters
11.4 centimeters 114 millimeters
12.4 centimeters 124 millimeters
13.4 centimeters 134 millimeters
14.4 centimeters 144 millimeters
15.4 centimeters 154 millimeters
16.4 centimeters 164 millimeters