# Millimeter Definition

In **Mathematics**, different units are used to measure the **length** of a particular **thing, object**, or **place**. A **millimeter** is one of those units that are used to measure lengths. Generally, the unit to measure length is a meter.

The **millimeter** is the **one-thousand part** of the **meter**. The word **“Milli”** has been derived from the Latin word **“Mille”** which means **one-thousand part**. That is why this unit of length is given the name **millimeter** because it is one of the **thousand parts** of the meter.

**Table of Contents**

**Note:**

Read about Millimeter to Inches here in detail.

1 meter = 1000 millimeter

## Representation of Millimeter

Every unit has a specific symbol to represent them in short form. The millimeter is shown by **“mm”**. The **“mm”** will be written just on the **right side** of the **number** representing the **length** of the object. Let us show you here how it is written.

100 millimeter = 100 mm

On a scale, you can see multiple lines dividing every centimeter into 10 small parts. Every part represents one millimeter on the scale.

### Other units of length & conversion to mm

As mentioned above, multiple units are used to measure the length of any object. Here is the list of those units and their conversion to the millimeter.

**Centimeter**

The centimeter is a bigger unit than the millimeter that comes into the sequence. There are **10 millimeters in 1 centimeter**. Here is the Mathematical representation of the relationship between these units.

1 centimeter = 10 millimeters

Also,

1 millimeter = 1/10 centimeters

**Note:**

Read about **Centimeter** here.

**Example 1:**

Convert 100 centimeters into millimeters.

**Solution:**

As we know,

1 centimeter = 10 millimeters

So,

100 centimeters = 100 x 10 millimeters

= 1000 millimeters

### Decimeter

Another unit of length is Decimeter.

1 Decimeter = 100 millimeters

Also, it can be said that 1 millimeter is one of the hundred parts of the decimeter.

1 millimeter = 1/100 decimeters

**Example 2:**

Convert 5000 millimeters into Decimeters.

**Solution:**

As we know,

1 millimeter = 1/100 decimeters

So,

5000 millimeters = 5000/100 decimeters

= 50 decimeters

### Meter

It is the standard unit of length that is used for average lengths. **1 meter means that it has 1000 millimeters.**.

1 meter = 1000 millimeters

**Example 3:**

Convert 5 meters into millimeters.

**Solution:**

As we know,

1 meter = 1000 millimeters

So,

5 meter = 5 x 1000 millimeters

= 5000 millimeters

### Kilometer

It is one of the most used units of length after the meter. Almost all big lengths are calculated and represented in this unit. **1 kilometer includes 1 million millimeters**.

1 Kilometer = 1000000 millimeters

**Note:**

Read about **Kilometer** here.

**Example 4:**

Convert 2 kilometers into millimeters.

**Solution:**

As we know,

1 Kilometer = 1000000 millimeters

So,

2 Kilometer = 2 x 1000000 millimeters

= 2000000 millimeters

### Is there any unit less than a millimeter?

In general Mathematics, no units are used that are less than millimeters. In **Physics**, smaller units are used including **micrometers**, **nanometers**, and others

### FAQ's

**Is a millimeter the smallest unit of measurement?**

In general Mathematics, it is the smallest unit of measurement. But there are other smaller units of measurement too in advanced Mathematics.

**Can we convert inches into millimeters?**

Yes, an inch is also a unit of measurement. 1 mm includes 0.0393 inches. So, you can easily interconvert these units.

**How many mm are in 1 cm?**

There are 10 mm in 1 cm.

**What is the size of a table in mm if it is 10 meters long?**

The size of the table in mm is 1000 mm if it is 10 meters long.