Inches to Millimeters Converter (in to mm) (2024)


Convert Millimeters to Inches (mm to in)▶

Conversion Table

inches to millimeters
inmm
1 in 25.4 mm
2 in 50.8 mm
3 in 76.2 mm
4 in 101.6 mm
5 in 127 mm
6 in 152.4 mm
7 in 177.8 mm
8 in 203.2 mm
9 in 228.6 mm
10 in 254 mm
11 in 279.4 mm
12 in 304.8 mm
13 in 330.2 mm
14 in 355.6 mm
15 in 381 mm
16 in 406.4 mm
17 in 431.8 mm
18 in 457.2 mm
19 in 482.6 mm
20 in 508 mm

How to convert

1 inch (in) = 25.4 millimeter (mm). Inch (in) is a unit of Length used in Standard system. Millimeter (mm) is a unit of Length used in Metric system.

Inch: A Unit of Length

The inch (in) is a unit of length used in the US customary system, which is one of the systems of measurement used in the United States and some other countries. The inch is equal to 1/12 of a foot or 2.54 centimeters. The inch is also a derived unit in the imperial system, which is the official system of measurement for the United Kingdom and some other Commonwealth countries. The symbol for inch is in or ″. The inch is used for measuring short distances and dimensions, such as the length of a nail or the width of a finger. The inch is named after the Latin word uncia, meaning one-twelfth. In this article, we will explore the definition, history, usage and conversion of the inch as a unit of length.

How to Convert Inch to Other Units of Length in the US Customary System

To convert inch to other units of length in the US customary system, we need to know the relationship between inch and other units. Here are some common units and their equivalent values in inches:

  • 1 foot = 12 inches
  • 1 yard = 36 inches
  • 1 mile = 63,360 inches
  • 1 mil = 0.001 inch

To convert inch to any of these units, we need to multiply or divide by the appropriate factor. For example, to convert 10 inches to feet, we need to divide by 12:

10 inches / 12 = 0.833 feet

To convert 10 inches to miles, we need to divide by 63,360:

10 inches / 63,360 = 0.000158 miles

To convert 10 inches to mils, we need to multiply by 1000:

10 inches x 1000 = 10,000 mils

How to Convert Inch to Other Units of Length in the SI System

To convert inch to other units of length in the SI system, we need to know the relationship between inch and meter. One inch is equal to 0.0254 meters.

To convert inch to any other unit of length in the SI system, we need to multiply or divide by the appropriate power of ten and add a prefix. Here are some common units and their equivalent values in inches:

  • 1 centimeter = 0.39370079 inches
  • 1 millimeter = 0.039370079 inches
  • 1 micrometer = 3.9370079 x 10-5 inches

To convert inch to any of these units, we need to multiply by the appropriate factor and add a prefix. For example, to convert 10 inches to centimeters, we need to multiply by 2.54:

10 inches x 2.54 = 25.4 centimeters

Millimeter: A Unit of Length

A millimeter is a unit of length in the metric system, which is based on the International System of Units (SI). It is defined as one thousandth of a meter, which is the SI base unit of length. One millimeter can be written as 1 mm or 0.001 m.

How to convert millimeter to other units of length

To convert millimeter to other units of length, we need to use conversion factors that relate the millimeter to the desired unit. For example, to convert millimeter to centimeter, we need to know that 1 cm = 10 mm, so we can divide the number of millimeters by 10 to get the number of centimeters. Similarly, to convert millimeter to inch, we need to know that 1 in = 25.4 mm, so we can divide the number of millimeters by 25.4 to get the number of inches.

Here are some common conversion factors for millimeter and other units of length in the US standard system and the SI system:

  • 1 mm = 0.1 cm
  • 1 mm = 0.03937 in
  • 1 mm = 0.001 m
  • 1 mm = 0.000001 km
  • 1 mm = 0.00000062137 mi
  • 1 mm = 0.00000053996 nmi
Millimeters also can be marked as millimetres.

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Inches to Millimeters Converter (in to mm) (2024)

FAQs

How do you convert inches into millimeters? ›

To convert inches to mm, you must multiply the unit by 25.4. For instance, if you have to convert 10 inches to mm, you need to multiply 10 with 25.4. Here are some popular metrics related to 1 inch.

How many mm is 1 ⁄ 2 inch? ›

How to Convert Inch to Millimeter
Decimal InchesFractional InchesMetric
0.313”5/16”7.95 mm
0.375”3/8”9.53 mm
0.438”7/16”11.13 mm
0.500”1/2”12.70 mm
21 more rows

How to calculate in mm? ›

To measure an object in mm, place one end of the object at the 0 mark on a metric ruler. Count the number of spaces between the shortest marks on the ruler. This is the length in mm.

What is the exact conversion of mm to inches? ›

One millimeter is approximately equal to 0.0394 inches. There are 25.4 millimeters in an inch. To convert millimeters into inches, divide the length in millimeters by 25.4.

How many mm is 1⁄8 inch? ›

To convert 1/8 inch to mm, divide 1 by 8 to convert the fraction to a decimal. Then, multiply that by 25.4 since there are 25.4 millimeters in one inch. That's the formula that our calculator uses to find that 1/8 inch to millimeters is 3.175 mm.

How many mm is 1 ⁄ 4 inch? ›

To convert 1/4 inch to mm, divide 1 by 4 to convert the fraction to a decimal. Then, multiply that by 25.4 since there are 25.4 millimeters in one inch. That's the formula that our calculator uses to find that 1/4 inch to millimeters is 6.35 mm.

What is 3/8th of an inch in mm? ›

9.53 mm

What size is 20 mm in inches? ›

0.78740 Inches

How big is 6 mm? ›

A measurement of 6 millimeters (mm) is roughly equivalent to the width of a standard paperclip or the thickness of a U.S. dime, making it a relatively small dimension, approximately 1/25th of an inch.

How many mm are in 1 inch exactly? ›

One inch is equal to 25.4 millimeters.

Is 32 mm equal to 1 inch? ›

Example #3: If an item measures 32mm tall... so 32mm is about 1-1/4" tall.

What does 5 mm look like? ›

Tumor sizes are often measured in millimeters (mm) or centimeters. Common items that can be used to show tumor size in mm include: a sharp pencil point (1 mm), a new crayon point (2 mm), a pencil-top eraser (5 mm), a pea (10 mm), a peanut (20 mm), and a lime (50 mm).

What is 1 mm equal to in inches? ›

1 MM = 0.0393701 Inches.

Is 25 mm one inch? ›

24mm = just over 15/16 inch. 25mm = almost 1 inch.

Is 20 mm the same as 1 inch? ›

20mm = 25/32 inch. 21mm = just over 13/16 inch. 22mm = almost 7/8 inch.

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