In a landmark decision, representatives from 60 countries voted to redefine the International System of Units (SI), changing the world's definition of the kilogram, the ampere, the kelvin and the ...

The Consultative Committee for Units, of which NIST is a member and which is one of 10 advisory committees of the International Committee for Weights and Measures (CIPM), submitted a draft ...

NEW LARGEST AND SMALLEST STANDARD UNITS OF MEASUREMENT. The prefixes make it easier to express large amounts – for example, always referring to a kilometre as 1,000 metres or a millimetre as one ...

The International System of Units (SI) is a standard, agreed on by most scientists, that underpins every measurement. As well as defining things like the kilogram and the metre, it sets how very ...

For the first time in 30 years, new terms have been officially added to the International System of Units. The four new prefixes – ronna, quetta, ronto and quecto – describe very large and ...

Today’s decision means that all seven SI units will now be defined in terms of physical constants. The biggest change will be to the kilogram, which is currently set by a 143-year-old platinum alloy ...

Usage: Applied to all SI units (meters, grams, seconds, etc.) and commonly used in computing, physics, and other fields; Conversion: Based on powers of ten, making conversions between metric system ...

Revamped definitions of scientific units are on their way. In the biggest overhaul of the international system of units (SI) since its inception in 1960, a committee is set to redefine four basic ...