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 121 millimeters into centimeters we have to multiply 121 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

121 mm → L_(cm)

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

L_(cm) = 121 mm × 0.1 cm

L_(cm) = 12.1 cm

The final result is:

121 mm → 12.1 cm

We conclude that 121 millimeters is equivalent to 12.1 centimeters:

121 millimeters = 12.1 centimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 centimeter is equal to 0.082644628099174 × 121 millimeters.

Another way is saying that 121 millimeters is equal to 1 ÷ 0.082644628099174 centimeters.

Approximate result

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

121 mm ≅ 12.1 cm

An alternative is also that one centimeter is approximately zero point zero eight three times one hundred twenty-one 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