| **This article needs additional references or sources for verification.** Please help improve this article by adding reliable references. Unverifiable material may be challenged and removed. | An **inch** (plural: **inches**; symbol or abbreviation: **in** or, sometimes, ″ - a double prime) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. Its size can vary from system to system. There are 36 inches in a yard and 12 inches in a foot. A corresponding unit of area is the square inch and a corresponding unit of volume is the cubic inch. â€œSIâ€ redirects here. ...
This article is about the unit of length. ...
A millimetre (American spelling: millimeter, symbol mm) is an SI unit of length that is equal to one thousandth of a metre. ...
U.S. customary units, also known in the United States as English units[1] (but see English unit) or standard units, are units of measurement that are currently used in the USA, in some cases alongside units from SI (the International System of Units â€” the modern metric system). ...
The Imperial units are an irregularly standardized system of units that have been used in the United Kingdom and its former colonies, including the Commonwealth countries. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
A yard (abbreviation: yd) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
This article is not about the symbol for the set of prime numbers, â„™. The prime (â€², Unicode U+2032, ′) is a symbol with many mathematical uses: A complement in set theory: Aâ€² is the complement of the set A A point related to another (e. ...
The former Weights and Measures office in Middlesex, England. ...
For other uses of this word, see Length (disambiguation). ...
English unit is the American name for a unit in one of a number of systems of units of measurement, some obsolete, and some still in use. ...
The Imperial units or the Imperial system is a collection of English units, first defined in the Weights and Measures Act of 1824, later refined (until 1959) and reduced. ...
U.S. customary units, also known in the United States as English units[1] (but see English unit) or standard units, are units of measurement that are currently used in the USA, in some cases alongside units from SI (the International System of Units â€” the modern metric system). ...
A yard (abbreviation: yd) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
This article is about the physical quantity. ...
A square inch is by definition the area enclosed by a square with sides each 1 inch long. ...
The volume of a solid object is the three-dimensional concept of how much space it occupies, often quantified numerically. ...
A cubic inch is the volume of a cube which is one inch long on each edge. ...
The inch is one of the dominant units of measurement in the United States, and is very commonly used in Canada. In the US and commonly in the UK, Australia, Canada and New Zealand, personal heights are expressed in feet and inches by people of all ages. In Canada, personal heights are shown in metric units on official documents such as a person's driver's license. Stature redirects here. ...
Current EU driving licence, German version - front 1. ...
Image File history File linksMetadata Download high-resolution version (2892x936, 242 KB) Picture of a common measuring tape in inches. ...
Image File history File linksMetadata Download high-resolution version (2892x936, 242 KB) Picture of a common measuring tape in inches. ...
Self-retracting pocket tape measure plastic tape measure A tape measure or measuring tape is a ribbon of cloth, plastic, or metal with linear-measure markings, often in both imperial and metric units. ...
## International inch
In 1958 the United States and countries of the Commonwealth of Nations defined the length of the international yard to be exactly 0.9144 meters. Consequently, the international inch is defined to be exactly 25.4 millimeters. Year 1958 (MCMLVIII) was a common year starting on Wednesday (link will display full calendar) of the Gregorian calendar. ...
The Commonwealth of Nations as of 2006 Headquarters Marlborough House, London, UK Official languages English Membership 53 sovereign states Leaders - Queen Elizabeth II - Secretary-General Don McKinnon (since 1 April 2000) Establishment - Balfour Declaration 18 November 1926 - Statute of Westminster 11 December 1931 - London Declaration 28 April 1949 Area - Total...
A yard (abbreviation: yd) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
The metre, or meter (symbol: m) is the SI base unit of length. ...
A millimetre (American spelling: millimeter), symbol mm is an SI unit of length that is equal to one thousandth of a metre. ...
The international standard symbol for inch is **in** (see ISO 31-1, Annex A). In some cases, the inch is denoted by a double prime, which is often approximated by double quotes, and the foot by a prime, which is often approximated by an apostrophe. For example, 6 feet 4 inches is denoted as 6′4″ (or approximated as 6'4"). ISO 31-1 is the part of international standard ISO 31 that defines names and symbols for quantities and units related to space and time. ...
This article is not about the symbol for the set of prime numbers, â„™. The prime (â€², Unicode U+2032, ′) is a symbol with many mathematical uses: A complement in set theory: Aâ€² is the complement of the set A A point related to another (e. ...
Quotation marks or inverted commas (also called quotes and speech marks) are punctuation marks used in pairs to set off speech, a quotation, a phrase or a word. ...
A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
This article is not about the symbol for the set of prime numbers, â„™. The prime (â€², Unicode U+2032, ′) is a symbol with many mathematical uses: A complement in set theory: Aâ€² is the complement of the set A A point related to another (e. ...
An apostrophe An apostrophe (French, from the Greek Î±Ï€Î¿ÏƒÏ„ÏÎ¿Ï†Î¿Ï‚ Ï€ÏÎ¿ÏƒÏ‰Î´Î¹Î±, the accent of elision) ( â€™ ) is a punctuation and sometimes diacritic mark in languages written in the Latin alphabet. ...
## Historical origin Swedish: *tum* inch, *tumme* thumb; Dutch: *duim* inch, *duim* thumb; Sanskrit: *Angulam* inch, *Anguli* Finger. The Sanskrit language ( , for short ) is a classical language of India, a liturgical language of Hinduism, Buddhism, and Jainism, and one of the 23 official languages of India. ...
Given the etymology of the word "inch", it would seem that the inch is a unit derived from the foot, but this was probably only so in Latin and in Roman times. In English, there are records of precise definitions for the size of an inch (whereas the definitions for the size of a foot are probably anecdotal), so it seems that the foot was then defined as 12 times this length. For example, the old English *ynche* was defined (by King David I of Scotland in about 1150) as the width of an average man's thumb at the base of the nail, even including the requirement to calculate the average of a small, a medium, and a large man's measures. To account for the much larger length later called an inch, there are also attempts to link it to the distance between the tip of the thumb and the first joint of the thumb, but this may be speculation. A foot (plural: feet or foot;[1] symbol or abbreviation: ft or, sometimes, â€² â€“ a prime) is a unit of length, in a number of different systems, including English units, Imperial units, and United States customary units. ...
King David I (or DabÃd mac MaÃl Choluim; also known as Saint David I or David I the Saint) (1084 â€“ May 24, 1153), was King of Scotland from 1124 until his death, and the youngest son of Malcolm Canmore and of Saint Margaret (sister of Edgar Ã†theling). ...
There are records of the unit being used circa AD 1000 (both *Laws of Æthelbert* and *Laws of Ælfred*). An Anglo-Saxon unit of length was the barleycorn. After 1066, 3 barleycorn was equal to 1 inch; it is not clear which unit was the base unit and which the derived unit. Dionysius Exiguus invented Anno Domini years to date Easter. ...
The Imperial units are an irregularly standardized system of units that have been used in the United Kingdom and its former colonies, including the Commonwealth countries. ...
One source says that the inch was at one time defined in terms of the yard, itself supposedly defined as the distance between Henry I of England's nose and his thumb. This is unlikely as Henry was born in 1068. A yard (abbreviation: yd) is the name of a unit of length in a number of different systems, including English units, Imperial units, and United States customary units. ...
Henry I (circa 1068 â€“ 1 December 1135) was the fourth son of William the Conqueror and the first born in England after the Norman Conquest of 1066. ...
Prior to the adoption of the international inch (see above), the United Kingdom and other countries of the Commonwealth of Nations defined the inch in terms of the Imperial Standard Yard. The United States and Canada each had their own, different, definition of the inch, defined in terms of metric units. The Canadian inch was defined to be equal to 25.4 millimeters. The Commonwealth of Nations as of 2006 Headquarters Marlborough House, London, UK Official languages English Membership 53 sovereign states Leaders - Queen Elizabeth II - Secretary-General Don McKinnon (since 1 April 2000) Establishment - Balfour Declaration 18 November 1926 - Statute of Westminster 11 December 1931 - London Declaration 28 April 1949 Area - Total...
The Imperial units or the Imperial system is a collection of English units, first defined in the Weights and Measures Act of 1824, later refined (until 1959) and reduced. ...
The International System of Units (symbol: SI) (for the French phrase Syst me International dUnit s) is the most widely used system of units. ...
A millimetre (American spelling: millimeter), symbol mm is an SI unit of length that is equal to one thousandth of a metre. ...
## See also |