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 ...

is participating in a worldwide effort to recommend major revisions to the International System of Units (SI), the modern metric system that is the basis of global measurements in commerce ...

For measurements on conventional scales, existing definitions of SI units suffice. But they are poor tools for modern science at the extremes. And basing units on specific points or materials can ...

Earth now weighs 6 Ronnagrams as new prefixes are added to the International Systems of Measurement ... added to the International System of Units (SI), the agreed global standard for the metric ...

Weighty matters: a platinum-iridium kilogram belonging to the US National Institute of standards and Technology. (Courtesy: J.L. Lee/NIST) Metrologists and policy-makers from 60 countries around the ...

Metric measurements — also known as the International System of Units, or SI — are managed by a formal international organization. The rulers of the rulers have rules, and "hellabyte" and ...