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 1240 centimeters into millimeters we have to multiply 1240 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

1240 cm → L_(mm)

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

L_(mm) = 1240 cm × 10 mm

L_(mm) = 12400 mm

The final result is:

1240 cm → 12400 mm

We conclude that 1240 centimeters is equivalent to 12400 millimeters:

1240 centimeters = 12400 millimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 millimeter is equal to 8.0645161290323E-5 × 1240 centimeters.

Another way is saying that 1240 centimeters is equal to 1 ÷ 8.0645161290323E-5 millimeters.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that one thousand two hundred forty centimeters is approximately twelve thousand four hundred millimeters:

1240 cm ≅ 12400 mm

An alternative is also that one millimeter is approximately zero times one thousand two hundred forty 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