ConvertOctopus Search

Unit Converter

Conversion formula

The conversion factor from millimeters to centimeters is 0.1, which means that 1 millimeter is equal to 0.1 centimeters:

1 mm = 0.1 cm

To convert 20 millimeters into centimeters we have to multiply 20 by the conversion factor in order to get the length amount from millimeters to centimeters. We can also form a simple proportion to calculate the result:

1 mm → 0.1 cm

20 mm → L(cm)

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

L(cm) = 20 mm × 0.1 cm

L(cm) = 2 cm

The final result is:

20 mm → 2 cm

We conclude that 20 millimeters is equivalent to 2 centimeters:

20 millimeters = 2 centimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 centimeter is equal to 0.5 × 20 millimeters.

Another way is saying that 20 millimeters is equal to 1 ÷ 0.5 centimeters.

Approximate result

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

20 mm ≅ 2 cm

An alternative is also that one centimeter is approximately zero point five times twenty millimeters.

Conversion table

millimeters to centimeters chart

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

millimeters (mm) centimeters (cm)
21 millimeters 2.1 centimeters
22 millimeters 2.2 centimeters
23 millimeters 2.3 centimeters
24 millimeters 2.4 centimeters
25 millimeters 2.5 centimeters
26 millimeters 2.6 centimeters
27 millimeters 2.7 centimeters
28 millimeters 2.8 centimeters
29 millimeters 2.9 centimeters
30 millimeters 3 centimeters