What is 1 inch in mm exactly?

1 inch = 25.4 millimeters . 1 inch = 2.54 centimeters. 1 centimeter = 10 millimeters.

How many mm is 1 ⁄ 2 inch?

Inches to millimeters conversion table Inches (") Millimeters (mm) 1/4 ″ 6.35 mm 1/2 ″ 12.7 mm 1 ″ 25.4 mm 2 ″ 50.8 mm 23 more rows

Is 20 mm the same as 1 inch?

Answer: 20 millimeters is equal to approximately 0.7874 inches . Here's how the calculation is done: Given Measurement: 20 mm. Conversion Factor: 1 inch = 25.4 mm.

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 .

Is 30 mm equal to 1 inch?

Since there are 25.4 millimeters in one inch , the length in inches is equal to millimeters divided by 25.4. Thus, the formula to convert millimeters to inches is the length divided by 25.4.

Technically, 3.5MM equals 0.138 inches (not quite 0.125, or 1/8, but close).

Is 7 mm the same as 1 4 inch?

6mm = almost 1/4 inch. 7mm = almost 9/32 inch (= a bit over 1/4 inch)

6 millimeters (mm) is approximately the width of a standard paperclip , or it's roughly equal to the thickness of a U.S. dime. It's a relatively small measurement, about 1/25th of an inch.

What does 5 mm look like?

Five millimeters (5 mm) is approximately equal to the width of a standard pencil eraser or the thickness of a stack of about 20 sheets of typical printer paper . It is a relatively small measurement, and objects that are 5 mm in size may appear quite thin or narrow to the naked eye.

How big is 1 mm actual size?

One millimetre is equal to 1000 micrometres or 1000000 nanometres . Since an inch is officially defined as exactly 25.4 millimetres, a millimetre is equal to exactly 5⁄127 (≈ 0.03937) of an inch.

What does 10 mm look like?

To give you an idea of what 10 millimeters look like, it's roughly the width of a standard paperclip or about the diameter of a large staple . It's a very small measurement, and often objects of this size are challenging to perceive with the naked eye.

Is 7mm bigger than 1/4 inch?

6mm = almost 1/4 inch. 7mm = almost 9/32 inch (= a bit over 1/4 inch)

Convert inches to mm (2024)

Home / Length Conversion / Convert inches to mm

Please provide values below to convert inch [in] to millimeter [mm], or vice versa.

Inch

Definition: An inch (symbol: in) is a unit of length in the imperial and US customary systems of measurement. An inch was defined to be equivalent to exactly 25.4 millimeters in 1959. There are 12 inches in a foot and 36 inches in a yard.

History/origin: The term "inch" was derived from the Latin unit "uncia" which equated to "one-twelfth" of a Roman foot.

There have been a number of different standards for the inch in the past, with the current definition being based on the international yard. One of the earliest definitions of the inch was based on barleycorns, where an inch was equal to the length of three grains of dry, round barley placed end-to-end. Another version of the inch is also believed to have been derived from the width of a human thumb, where the length was obtained from averaging the width of three thumbs: a small, a medium, and a large one.

Current use: The inch is mostly used in the United States, Canada, and the United Kingdom. It is also sometimes used in Japan (as well as other countries) in relation to electronic parts, like the size of display screens.

Millimeter

Definition: A millimeter (symbol: mm) is a unit of length in the International System of Units (SI). It is defined in terms of the meter, as 1/1000 of a meter, or the distance traveled by light in 1/299 792 458 000 of a second.

History/origin: The milli- prefix is one of many metric prefixes. It indicates one thousandth of the base unit, in this case the meter. The definition of the meter has changed over time, the current definition being based on the distance traveled by the speed of light in a given amount of time. The relationship between the meter and the millimeter is constant however. Prior to this definition, the meter was based on the length of a prototype meter bar. In 2019, the meter has been re-defined based on the changes made to the definition of a second.

Inch to Millimeter Conversion Table

Inch [in]	Millimeter [mm]
0.01 in	0.254 mm
0.1 in	2.54 mm
1 in	25.4 mm
2 in	50.8 mm
3 in	76.2 mm
5 in	127 mm
10 in	254 mm
20 in	508 mm
50 in	1270 mm
100 in	2540 mm
1000 in	25400 mm

How to Convert Inch to Millimeter

1 in = 25.4 mm
1 mm = 0.0393700787 in

Example: convert 15 in to mm:
15 in = 15 × 25.4 mm = 381 mm

Popular Length Unit Conversions

cm to inches

inches to cm

mm to inches

inches to mm

meters to feet

feet to meters

km to miles

miles to km

cm to feet

feet to cm

inches to feet

feet to inches

meters to yards

yards to meters

mm to cm

cm to mm

cm to m

m to cm

cm to km

km to cm

mm to feet

feet to mm

meters to miles

miles to meters

feet to miles

miles to feet

yards to feet

feet to yards

Convert Inch to Other Length Units

inches to meters

Inch to Kilometer

Inch to Decimeter

inches to cm

Inch to Micrometer

Inch to Nanometer

Inch to Mile

inches to yards

inches to feet

Inch to Light Year

Inch to Break

Inch to Exameter

Inch to Petameter

Inch to Terameter

Inch to Gigameter

Inch to Megameter

Inch to Hectometer

Inch to Dekameter

Inch to Micron

Inch to Picometer

Inch to Femtometer

Inch to Attometer

Inch to Megaparsec

Inch to Kiloparsec

Inch to Parsec

Inch to Astronomical Unit

Inch to League

Inch to Nautical League (UK)

Inch to Nautical League (int.)

Inch to League (statute)

Inch to Nautical Mile (UK)

Inch to Nautical Mile (international)

Inch to Mile (statute)

Inch to Mile (US Survey)

Inch to Mile (Roman)

Inch to Kiloyard

Inch to Furlong

Inch to Furlong (US Survey)

Inch to Chain

Inch to Chain (US Survey)

Inch to Rope

Inch to Rod

Inch to Rod (US Survey)

Inch to Perch

Inch to Pole

Inch to Fathom

Inch to Fathom (US Survey)

Inch to Ell

Inch to Foot (US Survey)

Inch to Link

Inch to Link (US Survey)

Inch to Cubit (UK)

Inch to Hand

Inch to Span (cloth)

Inch to Finger (cloth)

Inch to Nail (cloth)

Inch to Inch (US Survey)

Inch to Barleycorn

Inch to Mil

Inch to Microinch

Inch to Angstrom

Inch to A.u. Of Length

Inch to X-unit

Inch to Fermi

Inch to Arpent

Inch to Pica

Inch to Point

Inch to Twip

Inch to Aln

Inch to Famn

Inch to Caliber

Inch to Centiinch

Inch to Ken

Inch to Russian Archin

Inch to Roman Actus

Inch to Vara De Tarea

Inch to Vara Conuquera

Inch to Vara Castellana

Inch to Cubit (Greek)

Inch to Long Reed

Inch to Reed

Inch to Long Cubit

Inch to Handbreadth

Inch to Fingerbreadth

Inch to Planck Length

Inch to Electron Radius (classical)

Inch to Bohr Radius

Inch to Earth's Equatorial Radius

Inch to Earth's Polar Radius

Inch to Earth's Distance From Sun

Inch to Sun's Radius