You can easily convert 1 kilometer into millimeters using each unit definition:

- Kilometer
- kilo m = 1000 m
- Millimeters
- milli m = 0.001 m

With this information, you can calculate the quantity of millimeters 1 kilometer is equal to.

## ¿How many mm are there in 1 km?

In 1 km there are 1000000 mm.

Which is the same to say that **1 kilometer is 1000000 millimeters**.

One kilometer equals to one million millimeters. *Approximation

### ¿What is the inverse calculation between 1 millimeter and 1 kilometer?

Performing the inverse calculation of the relationship between units, we obtain that **1 millimeter is 1e-06 times 1 kilometer**.

A millimeter is one times one kilometer. *Approximation