If scientists had sacred objects, this would be one of them: a single, closely guarded 137-year-old cylinder of metal, housed in a vault outside of Paris. It is a prototype that precisely defines a ...

What unit of measurement should be used for specific reports? Whether printing out a check register or calculating square footage, using the correct team is essential. A size mistake can lead to ...

Taking the first steps of what would be a major historical advance in the science of measurement, the U.S. National Institute of Standards and Technology is participating in a worldwide effort to ...

The NIST-4 Kibble balance, an electromagnetic weighing machine that is used to measure Planck's constant, and in turn, redefine the kilogram. Jennifer Lauren Lee / NIST Locked in a vault that requires ...

If you’re from the US or are trying to understand American units of measure, there’s now an easier way to do that with Uniter. This is a new iPhone app that can convert measurements in real-time in ...

In the age of big data, it is time to ensure that units are routinely documented for easy, unambiguous exchange of information. Robert Hanisch is the director of the Office of Data and Informatics at ...