## 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 3 centimeters into millimeters we have to multiply 3 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

3 cm → L(mm)

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

L(mm) = 3 cm × 10 mm

L(mm) = 30 mm

The final result is:

3 cm → 30 mm

We conclude that 3 centimeters is equivalent to 30 millimeters:

3 centimeters = 30 millimeters

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 millimeter is equal to 0.033333333333333 × 3 centimeters.

Another way is saying that 3 centimeters is equal to 1 ÷ 0.033333333333333 millimeters.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that three centimeters is approximately thirty millimeters:

3 cm ≅ 30 mm

An alternative is also that one millimeter is approximately zero point zero three three times three 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)
4 centimeters 40 millimeters
5 centimeters 50 millimeters
6 centimeters 60 millimeters
7 centimeters 70 millimeters
8 centimeters 80 millimeters
9 centimeters 90 millimeters
10 centimeters 100 millimeters
11 centimeters 110 millimeters
12 centimeters 120 millimeters
13 centimeters 130 millimeters