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.

Gaithersburg

SP 330 - Appendix 2 & 3

Appendix 2. Practical realization of the definitions of some important units Appendix 2 is published in electronic form only, and is...

SP 330 - Appendix 1

Decisions of the CGPM and the CIPM This appendix lists those decisions of the CGPM and the CIPM that bear directly upon definitions of the...

June 2019 Minutes

VISITING COMMITTEE ON ADVANCED TECHNOLOGY (VCAT or Committee) MINUTES OF THE JUNE 4 TH and 5 th, 2019 MEETING GAITHERSBURG, MD...

SP 330 - Section 5

5. Writing unit symbols and names, and expressing the values of quantities 5.1 The use of unit symbols and names General principles for the...

SP 330 - Section 4

As of August 16, 2023 the physics.nist.gov historic SI Units site has permanently retired. This page and complete Metric (SI) Program...

SP 330 - Section 3

3. Decimal multiples and sub-multiples of SI units Decimal multiples and submultiples ranging from 10 24 to 10 −24 are provided for use with...

SP 330 - Section 2

2. The International System of Units 2.1 Defining the unit of a quantity The value of a quantity is generally expressed as the product of a...

SP 330 - Section 1

1. Introduction 1.1 The SI and the defining constants This brochure presents information on the definition and use of the...

SP 330 - Foreword

The International System of Units, universally abbreviated SI (from the French Le Système International d’Unités), is the modern metric...

MACE Consortium

Fri, Sep 20 2019
The Metrology of Additive Construction by Extrusion (MACE) consortium will meet to discuss progress toward advancing the

5615: Mass Metrology Seminar

Mon, Oct 19 - Fri, Oct 30 2020
The Mass Metrology Seminar is a two-week, "hands-on" seminar. It incorporates approximately 30 percent lectures and 70

Are You a Role-Model Leader?

What are the key attributes and behaviors for a role-model, visionary leader? The attributes and behaviors below are based on the Baldrige...
Was this page helpful?