Convert millimeters to yards

Symbol

The millimeter is represented by the symbol "mm." 

Description

Millimeter is an SI (International System of Units) unit of length. It is usually the smallest measure in rulers of the metric system.The word "milli" is derived from the Latin word mille, which means one thousandth. Therefore, a meter is equivalent to a thousand times a millimeter.

The international definition of meter which is the SI base unit of length, is the length of path that light takes in the vacuum over a period of 1/299 792 458 of a second. Thus, 1 millimeter is equivalent to 1/1000 meter. That implies that a millimeter is the distance that light travels in the vacuum in 1/299792458000 seconds.

Following that, there are 10 millimeters in a centimeter and 100 millimeters in a decimeter. In the other direction, a millimeter is equivalent to 1/10 centimeters. A millimeter is also equivalent to 1000 micrometers.

Interestingly the smallest dimension human eyes can detect is about 0.02 to 0.04 mm. This is about the thickness of human hair!

History

The term millimeter was first used in the late 1700s. It was introduced during the development and adoption of the metric system of weights and measures in France in 1795.

The first recorded use of the millimeter was in the Journal of Natural Philosophy in 1797, according to OED (Oxford English Dictionary).

Use

Millimeter is a very small unit of measure. Therefore it is usually used for measuring minute dimensions. 

Symbol

The yard is represented by the symbol “yd.”

Description

The Yard is a widely used unit of length in both the British imperial and US customary systems of measurements. It equals 3 feet or 36 inches. On the other hand, a distance of 1760 yards is equal to 1 mile. 

For yard to meter conversion, one yard is equivalent to 0.9144 meters. There are 0.0109 yards in a centimeter. In the other direction, a yard is equivalent to 91.44 centimeters. So for yard to cm conversion, divide yard measure by 91.44..

Moving on to area calculations now. There are 4840 square yards in an acre. So, a square yard is equivalent to 1/4840 acres.

The word yard is derived from the Old English gerd, gyrd, etc. It is a common unit of linear measure in English-speaking countries. Old and Middle English both used their forms of "yard" to denote surveying lengths of 15 feet (4.6 m) or 16.5 feet (5.0 m). It is commonly used in computing acres.

History

The yard measure's origins are not uncertain. The term “yard” was first used in the 12th century. It was defined by English King Henry I as the distance between his nose and the thumb of his extended arm.

After many other definitions, in 1855, the Weights and Measures Act officially recognized a new standard based on Baily's metal No. 4. From 1845 and 1855, 40 standards of yard were formed, one of them was the imperial standard.

After so many changes, in 1959, the yard that is now known as the international yard was defined as 0.9144 meters. The imperial standard in 1855 was renamed as the United Kingdom Primary Standard Yard.

Use

Yard line in American football is one great example of where yard is used. It is mostly used for field length measurements and other length measurements. In many parts of the world yard is used to measure clothing items.