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 680 centimeters into millimeters we have to multiply 680 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

680 cm → L_(mm)

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

L_(mm) = 680 cm × 10 mm

L_(mm) = 6800 mm

The final result is:

680 cm → 6800 mm

We conclude that 680 centimeters is equivalent to 6800 millimeters:

680 centimeters = 6800 millimeters

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 millimeter is equal to 0.00014705882352941 × 680 centimeters.

Another way is saying that 680 centimeters is equal to 1 ÷ 0.00014705882352941 millimeters.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six hundred eighty centimeters is approximately six thousand eight hundred millimeters:

680 cm ≅ 6800 mm

An alternative is also that one millimeter is approximately zero times six hundred eighty 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