How many thousandths are in 1 kilometer?

There are 1,000,000 thousandths in 1 kilometer. This is because a kilometer is equal to 1,000 meters, and each meter contains 1,000 millimeters, making 1 kilometer equal to 1,000,000 millimeters. Since a thousandth of a unit corresponds to one millimeter in this context, that totals to 1,000,000 thousandths in a kilometer.