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 503 millimeters into kilometers we have to multiply 503 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

503 mm → L_(km)

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

L_(km) = 503 mm × 1.0E-6 km

L_(km) = 0.000503 km

The final result is:

503 mm → 0.000503 km

We conclude that 503 millimeters is equivalent to 0.000503 kilometers:

503 millimeters = 0.000503 kilometers

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 kilometer is equal to 1988.0715705765 × 503 millimeters.

Another way is saying that 503 millimeters is equal to 1 ÷ 1988.0715705765 kilometers.

Approximate result

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

503 mm ≅ 0.001 km

An alternative is also that one kilometer is approximately one thousand nine hundred eighty-eight point zero seven two times five hundred three 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