# Convert 1 km to mm

In this article I will show you how to convert 1 kilometers into millimeters. Throughout the explanation below I might also call it 1 km to mm. They are the same thing!

## How to Convert Kilometers to Millimeters

A kilometer is greater than a millimeter. I know that a km is greater than a mm because of something called conversion factors.

Put very simply, a conversion factor is a number that can be used to change one set of units to another, by multiplying or dividing it. So when we need to convert 1 kilometers into millimeters, we use a conversion factor to get the answer.

The conversion factor for km to mm is:

1 km = 1000000 mm

Now that we know what the conversion factor is, we can easily calculate the conversion of 1 km to mm by multiplying 1000000 by the number of kilometers we have, which is 1.

1 x 1000000 = 1000000 mm

So, the answer to the question "what is 1 kilometers in millimeters?" is 1000000 mm.

## Kilometers to Millimeters Conversion Table

Below is a sample conversion table for km to mm:

Kilometers (km) Millimeters (mm)
0.0110000
0.1100000
11000000
22000000
33000000
55000000
1010000000
2020000000
5050000000
100100000000
10001000000000

## Best Conversion Unit for 1 km

Sometimes when you work with conversions from one unit to another, the numbers can get a little confusing. Especially when dealing with really large numbers.

I've also calculated what the best unit of measurement is for 1 km.

To determine which unit is best, I decided to define that as being the unit of measurement which is as low as possible, without going below 1. Smaller numbers are more easily understood and can make it easier for you to understand the measurement.

The best unit of measurement I have found for 1 km is kilometers and the amount is 1 km.