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 690 millimeters into kilometers we have to multiply 690 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

690 mm → L_(km)

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

L_(km) = 690 mm × 1.0E-6 km

L_(km) = 0.00069 km

The final result is:

690 mm → 0.00069 km

We conclude that 690 millimeters is equivalent to 0.00069 kilometers:

690 millimeters = 0.00069 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 1449.2753623188 × 690 millimeters.

Another way is saying that 690 millimeters is equal to 1 ÷ 1449.2753623188 kilometers.

Approximate result

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

690 mm ≅ 0.001 km

An alternative is also that one kilometer is approximately one thousand four hundred forty-nine point two seven five times six hundred ninety 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