The US has not yet adopted the metric system used in practically every other country. The US basic unit of length is the foot.
The basic metric unit is the metre.
Length->metersVolume->LitersMass->grams
In the Metric system, the Kilogram is the basic measure from which ALL other smaller or larger weights are compared. The world standard kilogram is stored in a temperature and humidity controlled room in Paris. In the Imperial system the basic unit is the Pound weight. Scientists all over the entire world, all use the Metric system for length and weight.
You can use any unit of length, such as meters or millimeters.
The best option is metres, centimetres and millimetres
The ISO length unit to use would be the cementer.
Meters are used as the unit for length in most countries, but some, such as the United States, use a different system of measurement.
It's SI unit is meters
In the U.S. the mile is used as a measurement for the length of a highway. In the U.K it is the kilometer.
always the meter to measure length. This is an SI (international) unit of measurment, and is the standard international unit of measurment for length.
miles or kilomiters
Kilometers are a unit of length, used to measure distance.