U.S. Metric Association

The US Metric Association (USMA), Inc., is a national non-profit organization that was founded in 1916. USMA advocates completing the US conversion to the International System of Units, known by the abbreviation SI(ess-eye) and also called the metric system. The process of changing measurement units to the metric system is called metric transition or metrication.

What’s New: Updated Information by Date

2015-08-01: PDF of the 2015-September/October issue of Metric Today is now available online for USMA members.

If you live in New York State:

New York State is the only US jurisdiction that has not yet adopted the 1999 amendment to the Uniform Packaging and Labeling Regulation (UPLR) that permits the option of eliminating non-metric units from labels of products not regulated by the federal Fair Packaging and Labeling Act (FPLA). Please contact USMA’s PR Director if you are willing to help with this cause.

Is Your Company or Organization Going Metric?

We’d Like to Know

Perhaps your hospital is changing over to measuring patients’ height and weight in metric units only, or your company’s product line is going hard metric. We’d be very interested in the how and the why. And, with your permission, we’ll tell your story in our newsletter, Metric Today. Please contact USMA.

Information About USMA

USMA and it’s Services

Publications and Supplies


Metric System Information:

Why use the metric system:

Using the Metric System

Background & History

For Your Information

Things You Can Do:

Metric System Information for Teachers/ Educators:



USMA offers a selection of books, charts, posters, rulers, measuring tapes, bumper stickers, and thermometers specifically for learning the metric system.

These and more items can be found on USMA’s
metric supplies and training aids page.

Your comments, suggestions, and questions are welcome.
Contact USMA

Links to Other Selected (Non-USMA) Metric System Information, Standards, Guides, and Policies

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Web site maintained by the USMA Webmaster.
Updated: 2015-09-17