News and Updates

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Advanced Mass Metrology alumni (Class of 2023)

Advanced Mass Metrology Training with Guidance on the Kilogram Consensus Value

July 7, 2025

NIST OWM will welcome a full class of students to its Advanced Mass Metrology course at NIST’s Gaithersburg, Maryland campus at the end of this July. This nine

C-RMAP 2025: “That’s A Wrap!”

July 7, 2025

In early June, over 115 metrologists from state, county, and federal government laboratories gathered with manufacturing and industry laboratory metrologists in

NIST unit conversion card ruler measures an autumn oak leaf

Classroom-Ready: NIST Releases Updated Metric Ruler and Conversion Card

July 7, 2025

The NIST Metric Program provides a wide range of educational materials to help students learn to apply the International System of Units (SI), commonly known as

NIST’s Kibble balance: A Mass revolution

June 2, 2025

NIST engineer Leon Chao never dreamed his childhood fascination with LEGOs would fit together with his professional life. But a working LEGO model he and his

Spotlight: Edward Garboczi and Ann Chiaramonti Debay Analyzed 14,000 Moon Dust Particles

February 27, 2025

Having such precise models of lunar dust will enable NASA and private space exploration companies to create more accurate simulations of the Moon’s surface.

2025 NIST OWM “Info Hours” Series

January 8, 2025

The NIST Office of Weights and Measures (OWM) is pleased to announce the schedule for the 2025 Info Hours series. An Info Hour is a one-hour session that

Map of RMAP regions without state listing

Coming in June 2025: Combined RMAP Training Event in Portland, Oregon

January 7, 2025

Every five years, NIST OWM gears up to host a Combined Regional Measurement Assurance Program (C-RMAP) training event with a state host with all six RMAP

NIST OWM and KEBS: Building Metrology Capacity for the RMOs

January 7, 2025

NIST Office of Weights and Measures (OWM) and the Kenya Bureau of Standards (KEBS) are currently conducting an interlaboratory mass comparison as part of a

A New ASTM E617 Standard and What It Means for NIST Handbook 105-1

January 7, 2025

One of OWM's main responsibilities is to harmonize international and national documentary standards with those used by the U.S. weights and measures community

A Better Balance for Tiny Liquid Masses

November 5, 2024

Scientists from the National Institute of Standards and Technology (NIST) are developing a mass balance to measure miniscule amounts of liquid with much higher

A person in a black shirt works on a mechanical device in a lab setting.

NIST Brings Mass Measurement to the Masses

June 12, 2024

NIST has delivered a portable and highly accurate instrument for measuring mass to the U.S. Army, marking the first time in the U.S. that this technology is

Mass Revolution: Kibble Balances for All

March 28, 2023

NIST is working on a big project in a small package. When you want to weigh something – anything – in the United States, whether it’s a truck full of cargo or a

Artifacts, Begone! NIST Improves Its Flagship Device for Measuring Mass

January 18, 2023

In a brightly lit subterranean lab at the National Institute of Standards and Technology (NIST) sits a room-sized electromechanical machine called the NIST-4

NIST Researchers Link Cutting-Edge Gravity Research to Safer Operation of Construction Cranes

February 17, 2022

In the beginning, all that Stephan Schlamminger wanted to do was to write down an equation that would help him obtain a more precise value for G, the

Sneezes, Rain Clouds and Ink Jets: NIST Improves the Ability of Optical Microscopes to Measure the Volume of Microdroplets

December 20, 2021

Sneezes, rain clouds, and ink jet printers: They all produce or contain liquid droplets so tiny it would take several billion of them to fill a liter bottle