# How many millimeters are in 3 km?

##### 1 Answer

#### Explanation:

The units from Biggest on the left to smallest on the right are:

The conversion factor between any of the adjacent units is 10.

When you convert a value to a bigger unit, the number gets smaller. (There are fewer of them.) This is done by dividing

When you convert a value to a smaller unit, the number gets bigger.(There are more of them.) This is done by multiplying.

**Km** is the biggest distance of the metric system. (Just more than half a mile.)

**mm** the smallest of the usual lengths in the metric system.

(About 25 mm makes 1 inch)

To convert 3 Km to mm, write 3 under Km and fill in a 0 under each of the other units

The decimal point shows what the unit is.