mm to inches (Millimeters to Inches)

Metric Conversions.

inches to mm (Swap units)

25.4mm = 1in

Format
Accuracy

Note: You can increase or decrease the accuracy of this answer by selecting the number of significant figures required from the options above the result.

Millimeters to Inches formula

Inches = Millimeters / 25.4

25.4 Millimeters to Inches calculation

Inches = Millimeters / 25.4

Inches = 25.4 / 25.4

Inches = 1

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.

 

Millimeters to Inches table

Starting value
Increment
Accuracy
Millimeters
Inches
0mm
0.00000in
1mm
0.03937in
2mm
0.07874in
3mm
0.11811in
4mm
0.15748in
5mm
0.19685in
6mm
0.23622in
7mm
0.27559in
8mm
0.31496in
9mm
0.35433in
10mm
0.39370in
11mm
0.43307in
12mm
0.47244in
13mm
0.51181in
14mm
0.55118in
15mm
0.59055in
16mm
0.62992in
17mm
0.66929in
18mm
0.70866in
19mm
0.74803in
20mm
0.78740in
21mm
0.82677in
22mm
0.86614in
23mm
0.90551in
24mm
0.94488in
25mm
0.98425in
26mm
1.02362in
27mm
1.06299in
28mm
1.10236in
29mm
1.14173in
30mm
1.18110in
31mm
1.22047in
32mm
1.25984in
33mm
1.29921in
34mm
1.33858in
35mm
1.37795in
36mm
1.41732in
37mm
1.45669in
38mm
1.49606in
39mm
1.53543in
40mm
1.57480in
41mm
1.61417in
42mm
1.65354in
43mm
1.69291in
44mm
1.73228in
45mm
1.77165in
46mm
1.81102in
47mm
1.85039in
48mm
1.88976in
49mm
1.92913in
50mm
1.96850in
51mm
2.00787in
52mm
2.04724in
53mm
2.08661in
54mm
2.12598in
55mm
2.16535in
56mm
2.20472in
57mm
2.24409in
58mm
2.28346in
59mm
2.32283in
60mm
2.36220in
61mm
2.40157in
62mm
2.44094in
63mm
2.48031in
64mm
2.51969in
65mm
2.55906in
66mm
2.59843in
67mm
2.63780in
68mm
2.67717in
69mm
2.71654in
70mm
2.75591in
71mm
2.79528in
72mm
2.83465in
73mm
2.87402in
74mm
2.91339in
75mm
2.95276in
76mm
2.99213in
77mm
3.03150in
78mm
3.07087in
79mm
3.11024in

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