mm to inches conversion: Millimeters to Inches calculator (2024)

How to convert millimeters to inches

To convert mm to inches you need to divide the value in mm by 25.4 as there are this many millimeters in an inch.

For example, suppose you have a length of 100 millimeters and you want to convert it to inches: divide 100 by 25.4 which gives approximately 3.937 inches.

To make the conversion easier, you can use the millimeters to inches conversion calculator provided on this page. This tool will calculatate the value for you and also give the result in fractional form if required. It is important to note that when converting between millimeters and inches, it is always a good idea to round the result to the desired level of precision, depending on the context of the measurement.

Why convert inches to millimeters?

Converting inches to millimeters is a common task in engineering, manufacturing and construction.

Inches are imperial measurements that are normally used in the United States and United Kingdom. Millimeters are a unit of the metric system used worldwide. It is often necessary to convert inches to millimeters when following instructions of specifications in a unit unfamiliar to you.

Millimeters are used where high precision is required such as machining and fabrication. The smaller unit the simpler it is to allow for finer measurements.

The metric system offers a logical system of measurement as converting between other metric units are simple and they are based on factors of 10.

What are millimeters?

Millimeters are a small unit of length measurement in the metric system. One millimeter is equal to a thousandth of a meter. This means that millimeters are used when measuring small distances or dimensions such as the thickness of a sheet of paper or a small object.

Millimeters are widely used worldwide especially in engineering. They provide a convenient unit of measurement for fine details.

Millimeters are used in the fashion industry for jewelry and fabric widths. Millimeters are also used in meteorology to record rainfall or snowfall.

1000mm is equal to a meter which is the SI unit of length.

Some common Millimeters to Inches conversions

1mm to inches = 0.03937in

What are inches?

Inches are commonly used in the United States and the United Kingdom. An inch is defined as one twelth (1/12th) of a foot and used to measure small distances like the length of a pencil or the width of a book.

Inches are often used in construction, carpentry and engineering. They are also often found in the fashion industry for determining clothing sizes and are used to specify screen sizes for TVs and computer monitors.

To convert inches to other units you need to know the appropriate conversion factor. For example, to convert inches to centimeters you need to multiply the inch value by 2.54. To convert inches to millimeters the inch measurement is multiplied by 25.4.

Inches are used mainly in the United States but it is common to find people using inches in the United Kingdom especially for body measurements, trades and fashion. Inches are a standard worldwide in electronics and semiconductors.

Which countries use millimeters?

A majority of countries worldwide have adopted the metric system and as such use millimeters.

In these countries millimeters are the preferred unit for measuring dimensions of building materials, such as pipes, beams, and panels. Millimeters are found in manufacturing for precision measurements, machinery, and tools. Millimeters are also used in medicine and are used in the fashion and textile industry.

Which countries use inches?

The United States is the most notable country that uses inches but a large number of people still use them in the United Kingdom as well. In the US, inches are the standard in construction and engineering. Inches are also common in determining a person's height or the size of television screens.

Although the UK has officially adopted the metric system, inches are still found in certain area particularly in construction. This is due to the historical influence of the imperial system. In the UK inches are also used for body height and objects that were traditionally measured this way such as vinyl records.