Guides to SI

On this page
[U.S. and Metric System] [NIST Reference] [Correct Usage]
[National Physical Laboratory] [Metrology SI
[James R. Frysinger's Guide] [TheMetricSystem.info]
[metre.info] [SI Units in German and Russian]


United States Flag The United States and the Metric System
View History of SI at NIST Web Site

Here, NIST (National Institute of Standards and Technology) offers a Capsule History of metrication in the USA and answers a number of frequently-asked questions. For more on NIST, see NIST/Metric Program.

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United States Flag The NIST Reference on Constants, Units and Uncertainty
View SI Guide at NIST Web Site This reference is divided into three main sections:
  • Essentials of the SI
  • Background
  • Bibliography

See also Downloadable Documents for NIST's 1995 Special Publication 811, Guide for the Use of the International System of Units. For more on NIST, see NIST/Metric Program.

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United States Flag Correct SI Metric System Usage
View Usage Guide at USMA Web Site

This reference is at the U.S. Metric Association web site. Not only does it provide information on the correct usage of SI symbols and prefixes, it also shows a number of the more common incorrect usages.

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Union Jack (United Kingdom Flag) National Physical Laboratory: Beginner's Guide to Measurement

The NPL site contains a Beginner's Guide to Measurement. The links to its sections are in the menu in the white area of the page. Click on Go or the NPL logo to view the guide.

View NPL Beginner's Guide to Measurement  View NPL Beginner's Guide to Measurement

Alternatively, you may go directly, from here, to the sections on length, mass and temperature.

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Swedish Flag Metrology The SI system
View SI Guide at Swedish National Testing and Research Institute Web Site

This guide, at the web site of the Swedish National Testing and Research Institute, includes a diagram showing the relationships among the SI base units and derived units. Although this is a Swedish site, the information is of US origin.

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United States Flag James R. Frysinger's SI Guide
View Jim Frysinger's SI Guide

If you need to know the names of the SI units in Chinese, French, German, Greek Italian, Japanese Russian or Spanish, this is the site to visit. Of course, it has quite a few other topic headings. Click on the language to go directly to the associated page. Click on the Go button to start at the home page.

For several of these pages, your browser must support UTF-8 encoding (Unicode) and the appropriate alphabet. If your browser does not have such capability, you might want to download and install a later version. Links for Microsoft Internet Explorer and Netscape Communicator are provided at the bottom of the About SI Navigator page. For Microsoft Windows, you will also need to visit the Windows Update site, using the built-in Windows Update Manager.

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United States Flag TheMetricSystem.info
View Jim Frysinger's SI Guide

This site was developed as a public service by U.S. Metric Association member, Carl Sorenson. It contains the following sections: Why metric? How to learn the metric system, Overview of important units, The conversion of the U.S., FAQ, Links, and Primary documents.

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Union Jack (United Kingdom Flag)

metre.info

View Jim Frysinger's SI Guide

This site was created by Chris Kaese, in the UK. If you want a complete reference to SI units, plus obsolete metric units, this is the place to go. The site, which uses frames, will open in a new window.

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German Flag Andreas Prilop's Guide to SI Unit Names and Symbols in German and Russian
Go to tables of SI units and symbols in German and Russian (SI-Einheiten auf Deutsch und Russisch)

If you know German (or Russian), this page, at the University of Hannover web site, may be of interest. It requires that your browser support UTF-8 encoding (Unicode).

Go to tables of SI units and symbols in German and Russian (SI-Einheiten auf Deutsch und Russisch)

If your browser does not have UTF-8 support, but does have Cyrillic (ISO) support, you can select this alternative page. (The full designation for this code set is ISO 8859-5.)

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United States Flag Traveling with Ed and Julie: Weights and Measures (A Primer for Travelers to Europe)
 

For those who've used this site in the past, please note that it no longer exists. 

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On this page
[U.S. and Metric System] [NIST Reference] [Correct Usage]
[National Physical Laboratory] [Metrology SI
[James R. Frysinger's Guide] [TheMetricSystem.info]
[metre.info] [SI Units in German and Russian]


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