Free calculators and unit converters for general and everyday use.
Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can convert length values from millimeters to kilometers and kilometers to millimeters.
1 kilometer = 1000000 millimeters
1 millimeter = 1.0E-6 kilometers
The symbols used are mm for millimeter and km for kilometer.
Convert 9 millimeters to kilometers
9 mm = 9*1.0E-6 km = 9.0E-6 km