Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Taking Measure

Just a Standard Blog

Jon Pratt

Jon R. Pratt is the Chief of the Quantum Measurements Division, home to both the Mass and Force and Fundamental Electrical Measurements groups that are working to redefine the kilogram. When Jon isn’t managing the affairs of the division, he enjoys playing guitar and writing the occasional song. He provided the soundtrack to the Do-It-Yourself Watt Balance video.

Reason and Measurement, Suits and Ties: My Personal Journey to the New SI

October 30, 2018

On Nov. 16, 2018, the General Conference on Weights and Measures, the governing body of the International Bureau of Weights and Measures, will hold a gathering

World Metrology Day: Kilogram in the Balance

May 20, 2016

It was Monday, April 25, 2016, and I was going to meet mass experts Pat Abbott and Eddie Mulhern of NIST’s Mass and Force group as part of my frantic

Our Science in Your Inbox

Subscribe to our weekly emails.