Conversion formula

The conversion factor from millimeters to kilometers is 1.0E-6, which means that 1 millimeter is equal to 1.0E-6 kilometers:

1 mm = 1.0E-6 km

To convert 680.2 millimeters into kilometers we have to multiply 680.2 by the conversion factor in order to get the length amount from millimeters to kilometers. We can also form a simple proportion to calculate the result:

1 mm → 1.0E-6 km

680.2 mm → L_(km)

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

L_(km) = 680.2 mm × 1.0E-6 km

L_(km) = 0.0006802 km

The final result is:

680.2 mm → 0.0006802 km

We conclude that 680.2 millimeters is equivalent to 0.0006802 kilometers:

680.2 millimeters = 0.0006802 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 1470.1558365187 × 680.2 millimeters.

Another way is saying that 680.2 millimeters is equal to 1 ÷ 1470.1558365187 kilometers.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six hundred eighty point two millimeters is approximately zero point zero zero one kilometers:

680.2 mm ≅ 0.001 km

An alternative is also that one kilometer is approximately one thousand four hundred seventy point one five six times six hundred eighty point two millimeters.

Conversion table

millimeters to kilometers chart

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