# Inches (in) to Millimeters (mm) Converter

## How many Inches (in) are in a Millimeter (mm)?

One inch (in) is equivalent to 25.4 millimeters (mm). In other words, there are 25.4 millimeters in 1 inch. Conversely, there are approximately 0.039370079 inches in 1 millimeter.

## What is the formula for how to convert Inches (in) to Millimeters (mm)?

To convert inches (in) to millimeters (mm), you can use the following formula:

`Millimeters (mm) = Inches (in) × 25.4`

For example, if you have a measurement of 5 inches, and you want to convert it to millimeters, you would use the formula as follows:

`Millimeters (mm) = 5 in × 25.4 = 127 mm`

So, 5 inches are equal to 127 millimeters.

## Inches (in) to Millimeters (mm) conversion table

Here is a conversion table that shows common values of inches and their equivalent measurements in millimeters:

This table can be useful when you need to quickly convert inch measurements to millimeters.

## Conversion of 1 Inch (in) to other units of length

Converting 1 inch (in) to other common units of length gives us the following results:

• 1 Inch (in) = 25,400,000 Nanometers (nm)
• 1 Inch (in) = 25,400 Microns (µm)
• 1 Inch (in) = 254 Millimeters (mm)
• 1 Inch (in) = 2.54 Centimeters (cm)
• 1 Inch (in) = 0.254 Decimeters (dm)
• 1 Inch (in) = 0.0254 Meters (m)
• 1 Inch (in) = 0.0000254 Kilometers (km)
• 1 Inch (in) = 0.083333333 Feet (ft)
• 1 Inch (in) = 0.027777778 Yards (yd)
• 1 Inch (in) = 0.000015782828 Miles (mi)
• 1 Inch (in) = 0.000013714903 Nautical miles (nmi)

## What is an Inch (in)?

An inch (in) is a unit of length primarily used in the United States and some other countries that have not fully adopted the metric system. It is equivalent to 1/12 of a foot or precisely 2.54 centimeters. The inch is traditionally part of the imperial system of measurement and is commonly used for everyday measurements in these regions.

To provide a sense of scale, consider that a US dollar bill is approximately 6.14 inches long, and a typical smartphone screen measures around 6 inches diagonally.

## What is a Millimeter (mm)?

A millimeter (mm) is a unit of length in the metric system. It is equal to one-thousandth of a meter (1/1000 m). The metric system, which includes the millimeter, is a decimal-based system used worldwide for measurements. The millimeter is commonly employed for precise measurements, especially in scientific, engineering, and manufacturing applications.

To provide a sense of scale, consider that the thickness of a credit card is roughly 0.76 millimeters, and the average diameter of a human hair is about 0.1 to 0.2 millimeters.

Understanding the conversion from inches to millimeters is important when dealing with international measurements and when working with materials that use the metric system. The precise relationship between these two units, with 1 inch equal to 25.4 millimeters, facilitates accurate conversions and calculations in various fields and applications.