**How to convert 1 km to mm? Try the video and equations here. How many millimeters in a kilometer?**

## 1 kilometer is equal to 1,000,000 mm.

Online Unit Numerator – 1 km to mm

## How many mm in 1 km?

We usually use different units for length in different countries. There are several internationally agreed systems of measurements. For example, the metric system, Imperial units (also known as British Imperial), and the Chinese system of weights and measures. Each and every system of unit and conversion is common in various countries and regions.

Unit System | Units Examples |

The metric system | millimeters (mm), centimeter (cm), decimeter (dm), meter (m), dekameter (dam), hectometer (hm), and so on. |

Imperial units | inch (″), foot (ft), yard (yd), mile(mi, ml), nautical mile (nm), fathom, furlong, Thousandth of an inch… |

The Chinese system | li, zhang, chi, cun, fen, si, hu… |

## What’s 1 km in millimeters?

But 1 km is equal to how many mm? As we know, based on the basic formula that there are 10 millimeters in 1 cm (centimeter / centimetre), 100 cm in 1 m (meter /metre) and 1000 m (meter) in 1 km (kilometer /kilometre).

The following are 2 videos explaining how to convert different units, and the 2nd one focuses on showing how long each unit is. So, how many millimeters are in 1 km?

```
So,
. 1 cm = 10 mm
. 1 m = 100 cm
. 1 km = 1000 m
```**1 kilometer** = **10 mm x 100 cm x 1000 m = 1,000,000 mm**
**1 kilometer** = **1,000,000** millimeters
(PS: cm= centimeter (plural: centimeters), mm= millimeter (plural: millimeters), km = kilometer (plural: kilometers))

## How Many mm in a km – Video

## How Long is a mm, cm, m and km – Video

Got a different answer? Which unit system do you use or prefer?

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