The inch is a commonly used length unit in the United States and many other countries. An inch is equal to 0.00039 meters. The inch was originally a Roman unit of length, equal to 1/12 of a foot. It became an SI unit in the early 19th century, and is now one of the six standard lengths interdependent with meters (along with meter, kilometer, millimeter, micro meter, and nano meter). In 1935, theUSEb added the “point” to the name of the inch; thus 0.0003936 meters becomes 3.62 points, or 1/32nd of an inch.

A meter is the basic unit of measurement in the metric system. Originally, meters were the length of a pendulum that shook each time it hit a floor or a beam. The original metric system was based on the length of a pendulum and consisted of 1/10 000th of a kilometer (or one tenth of a millimeter). Today, meters are used to measure everything from length to volume to temperature. Meter is a unit of measurement that originated in ancient India. It was primarily used to measure liquids, such as water and rice wine, but it has since been adapted for other uses. In particular, meter is the standard by which length and weight are measured. Today, meter is most commonly used to measure electricity, gas and water. Butmeter has also been adopted by some industries as their preferred standard for measuring quantities such as freight volume, material flow or production output.