U.S. flag

An official website of the United States government

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.

Physical Measurement Laboratory

Office of Weights and Measures

Projects/Programs

Displaying 1 - 7 of 7
group photo taken at NCWM 2023 Annual Meeting; Craig VanBuren, Don Onwiler, and Mahesh Albuquerque of NCWM, Laurie Locascio and Katrice Lippa of NIST, Gene Robertson of NCWM, David Sefcik

NIST OWM – NCWM: An Enduring Partnership

Ongoing
The National Conference on Weights and Measures (NCWM) was first held as the “First Annual Meeting of Sealers of Weights and Measures of the United States” in 1905 and as part of the National Bureau of Standards (NBS), which was the predecessor non-regulatory agency to the National Institute of
OWM Laboratory Metrology Training for mass metrology

OWM Training Program: Metrology, Metrication, and More!

Ongoing
OWM offers a variety of in-person, online, and "blended" training classes and materials that provide guidance instruction on national legal metrology standards, weights and measures field inspection procedures, and laws and regulations related to packaging and labeling. OWM provides technical
Shrinkflation-new package fewer tea bags

Uniform Unit Pricing: Tools for Consumers to Fight Shrinkflation

Ongoing
What is Shrinkflation? Many consumers across the U.S. are increasingly aware of the decreasing quantity for many of the products that they regularly purchase and consume. This concept is know as product downsizing or “s hrinkflation”, a term used to describe how a consumer product is sold at the
Jan Konijnenburg Testing Device Thumbnail

USNWG Field Reference Meters: Coriolis Mass Flow Meters

Ongoing
Customers and businesses alike rely on metering systems to monitor and deliver their liquid-based commercial products (including a range of gas and fuels) consistently over time and across a range of locations. Weights and measures officials use several well-acknowledged field test standards to