## 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 45 centimeters into millimeters we have to multiply 45 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

45 cm → L(mm)

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

L(mm) = 45 cm × 10 mm

L(mm) = 450 mm

The final result is:

45 cm → 450 mm

We conclude that 45 centimeters is equivalent to 450 millimeters:

45 centimeters = 450 millimeters

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 millimeter is equal to 0.0022222222222222 × 45 centimeters.

Another way is saying that 45 centimeters is equal to 1 ÷ 0.0022222222222222 millimeters.

## Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that forty-five centimeters is approximately four hundred fifty millimeters:

45 cm ≅ 450 mm

An alternative is also that one millimeter is approximately zero point zero zero two times forty-five 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)
46 centimeters 460 millimeters
47 centimeters 470 millimeters
48 centimeters 480 millimeters
49 centimeters 490 millimeters
50 centimeters 500 millimeters
51 centimeters 510 millimeters
52 centimeters 520 millimeters
53 centimeters 530 millimeters
54 centimeters 540 millimeters
55 centimeters 550 millimeters