All countries use the metric system to varying degrees. Most of the world has adopted the metric system as their official system of measurement with one major exception: the United States.

A metric prefix is a numerical multiplier that is placed before a basic unit of measure to indicate a specified multiple or fraction of that unit. The 20 recognized metric prefixes have been specified ...

Related: Meet the zeptosecond, the shortest unit of time ever measured This is the first time that new prefixes have been added to the metric system since the addition of zetta (10˄21), zepto (10 ...

The conference meets every four years at Versailles; it’s in charge of the International System of Units, which is the running list of metric system units. You can see a list of all the metric ...

By 1960, the metric system had been expanded and modernized to cover aspects of all of Earth, from voltage to speed, heat capacity to radiance. That year, the International System of Units, or SI ...

The battle of the standards: why the US and UK can’t stop fighting the metric system. Metric units have conquered the globe, but in the US and the UK, their presence has become part of a culture ...

Meet the metric system’s newest prefixes: ronna-, quetta-, ronto- and quecto-. Adopted November 18 at the 27th General Conference on Weights and Measures in Versailles, France, ronna- and quetta ...

While most of the rest of the world uses the metric system (formally known as the International System of Units, or SI), the United States uses the U.S. Customary System, which—fun fact—is ...