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 3420 millimeters into kilometers we have to multiply 3420 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

3420 mm → L_(km)

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

L_(km) = 3420 mm × 1.0E-6 km

L_(km) = 0.00342 km

The final result is:

3420 mm → 0.00342 km

We conclude that 3420 millimeters is equivalent to 0.00342 kilometers:

3420 millimeters = 0.00342 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 292.39766081871 × 3420 millimeters.

Another way is saying that 3420 millimeters is equal to 1 ÷ 292.39766081871 kilometers.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that three thousand four hundred twenty millimeters is approximately zero point zero zero three kilometers:

3420 mm ≅ 0.003 km

An alternative is also that one kilometer is approximately two hundred ninety-two point three nine eight times three thousand four hundred twenty 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