# Millimeter Calculator

Table of contents

What are millimeters? Metric system conversionHow to convert millimeters to inches?How to use our millimeter calculator?Another length-related calculatorsFAQsThe handy millimeter calculator enables quick conversion of several metric and imperial units such as:

**Millimeters to inches**; or**Millimeteres to meters.**

It also helps when you have other units and want to get its value in millimeters:

**Centimeters to millimeters**; or**Inches to millimeters.**

Keep reading this short article and find out how this powerful calculator can help you in your daily routine.

## What are millimeters? Metric system conversion

**Millimeters are the 1000th part of a meter.** It is normally used to express the distance between two points or measure an object's length. For changing millimeters to meters, we use the next conversion factor:

$\footnotesize \rm{1 \ millimeter = 1 / 1000 \ meters = 0.001 \ m}$

Besides, the meter is defined as **the distance of the path traveled by light in a vacuum in 1/299,792,458 of a second.**

Now, if we remember that 100 centimeters are 1 meter, then if we divide it by 1000:

$\footnotesize \rm{1 / 1000 \ m = 100 / 1000 \ cm}$

$\footnotesize \rm{1 \ millimeter = 0.1 \ cm}$

Also, if 1000 meters are 1 kilometer, then:

$\footnotesize \rm{1 \ m \times 1000 = 1000 \ mm \times 1000}$

$\footnotesize \rm{1 \ km = 1,000,000 \ mm}$

Keep reading. In this millimeter calculator, we will find out how to convert millimeters to inches and other units.

## How to convert millimeters to inches?

**Our millimeter calculator has the feature to convert millimeters to several imperial system metrics.** One of them is the inch. The inch definition is:

$\footnotesize \rm{1 \ inch = 2.54 \ cm}$.

So, if we know that 1 cm equals 10 mm, how many millimeters are in an inch? Quite easy:

$\footnotesize \rm{1 \ inch = 2.54 \ cm \times 10 = 25.4 \ mm}$.

Our millimeters calculator can also help you determine millimeter value expressed in yards, feet, and miles.

## How to use our millimeter calculator?

Imagine you have one of these questions:

- How many millimeters are in an inch?
- How many millimeters are in a meter?

You can use our tool to find it out. Follow the next steps:

**Introduce your millimeter's value**, and instantly, the calculator will show the inch conversion value, as well as the meter's value.- Also,
**you can start typing the value expressed in meters or inches**, and it will indicate the original length in millimeters.

### How many millimeters are in one inch?

**25.4 mm**. Here is how you can use that information on a daily basis:

- Consider your smartphone screen is 6 inches.
- Multiply six by 25.4.
- The result is 152.4 mm. That's the size of your phone screen.

### How many millimeters are in a centimeter?

**10 mm**. Whenever you have millimeters values and want to express them in centimeters, follow the next instructions:

- Pick the millimeters value and divide it by 10.
- The result indicates the original value in centimeters. For example, a 200 mm screen has the same length as a 20 cm one.