Inch to mm conversion: inches to millimeters calculator (2024)

How do you convert inches to millimeters?

To convert inches to mm you need to multiply 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 inches and you want to convert it to millimeters: multiply 100 by 25.4 which gives you 2,540mm.

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

Why would one convert inches to millimeters?

Converting millimeters to inches 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 Inches to Millimeters conversions

1/4 inch to mm = 6.35mm

3/8 inch to mm = 9.525mm

1/2 inch to mm = 12.7mm

3/4 inch to mm = 19.05mm

1 inch to mm = 25.4mm

1 1/4 inch to mm = 31.75mm

2 inches to mm = 50.8mm

3 inches to mm = 76.2mm

4 inches to mm = 101.6mm

5 inches to mm = 127mm

6 inches to mm = 152.4mm

What are inches?

Inches are mainly used in the United States as well as sometimes in the United Kingdom.

An inch is an imperial unit which is primarily used in the United States. It is defined as a twelth (1/12th) of a foot. Inches are used to measure smaller distances such as the length of a pencil or the width of a book. Rather than using decimals, Inches are often divided into fractions such as halves, quarters, and eighths.

Converting inches to centimeters involves multiplying by the conversion factor 2.54. For example, 100 inches would be 254 centimeters. The reverse is also true, to convert centimeters to inches you divide the number of centimeters by 2.54. For example, 50 centimeters would be approximately 19.69 inches.

Is there a simple way to convert inches to mm?

The actual formula is mm = in * 25.4 which is approximately multiply by 25. If you multiply the amount of inches by 100 and then divide by 4 you will get an approximate answer. Worked Example: 3 inch x 300 = 100, 300 / 4 = 75mm. This method is close enough for many purposes.

What is the symbol for inches?

The ISO symbol for inch is "in", but it's frequently marked as a double prime ("). Feet is often marked as a single prime ('). So 5 feet 3 inches can be marked as 5' 3".

What size is 1 inch in MM?

There are 25.4mm in one inch.

How many Inches are in 1 Millimeter?

There are 0.03908 Inches in 1 Millimeter

How long is 1 Inch?

1 inch - A normal-sized paperclip

2 inches - An AA battery

3 inches - The length of a standard post-it note

8 inches - Approx. length of a standard house brick, or a standard paperback book

8 -9 Inches - Approx length of a normal dinner knife

12 inch - A standard school ruler

How long is 1 Millimeter?

2 Millimeters - A grain of short rice

5 Millimeters - The eraser on the end of a pencil

55 Millimeters - Height of a debit/credit/charge card

86.6 Millimeters - Length of a debit/credit/charge card

120 Millimeters - Width of a standard CD

300 Millimeters - A standard (30cm) ruler

What are the most common misspellings of Millimeters?

Millimetre (not actually a mis-spelling - this is the British English spelling)

Milimeter

Can I do the opposite conversion - ie Millimeters to Inches - on this site?

Yes - just click here to use our Millimeters to Inches calculator

What is the difference between Millimetres and Millimeters?

There is no difference between Millimeters and Millimetres - they are just different ways of spelling the same thing. Millimetres is the British English spelling, and Millimeters is the American English spelling.

Is 5 mm equal to 1/2 inch?

No, 5mm is 0.19685 inch (or 13/64 inch). A half inch is 12.7mm.

How many mm is 1 ⁄ 4 inch?

1⁄4 inch is 6.35mm - please see this page: 1/4 inch in mm

What is 4 inches as mm?

4 inches as mm = 101.6mm

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.

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.