r/Metric

6.2K archived posts · Jul 2009 – Sep 2026

Metric: Setting the Standard of Measurement

r/Metric

This community promotes the International System of Units (SI) and its use around the world. Posts discussing metrology, measurement, the SI system, standardisation and related topics are welcome! Please post jokes, memes and cartoons to r/metriccrusade

Created Jul 12, 2009

8KMembers (last snapshot)

6.2KArchived posts

#About

Seeking to promote the International System of Units (SI) and its use around the world. Posts discussing metrology, measurement, the SI system, standardisation and related topics are welcome! #Posts and comments

Please note: We have previously had trouble with trolls, so please make your posts relevant, keep your comments on-topic and make sure your language is civil.

Please post jokes, memes and cartoons to r/metriccrusade

If you are looking for the Canadian indie rock band, Metric, go to r/metricband/ Thank you.

Reddit's rules regarding content of posts and behaviour of Redditors.

Reddiquette – Etiquette for people making submissions or comments to Reddit's pages.

#Metric Petition

WH Petition (Response)

#Community Metric FAQs An Introduction to the SI System.

Switch your own measuring to the metric system.

#Resources

Bureau international des poids et mesures (BIPM)
International Bureau of Weights and Measures. The international organisation for maintaining measurement standards for the world.
Metric/Imperial Conversion Calculator. Google and Wolfram Alpha have built in conversion calculators as well.
Metric Reference Points from XKCD
USMA & UKMA
The US Metric Association and the UK Metric Association.
BIPM brochure The official guide to the metric system.
The NIST has a number of free publications available as downloads. (NIST - National Institute of Science and Technology)
SI Teachers kits available free of charge to schools in America.
A Dictionary of Units of Measurement An online dictionary of units of measurements, ancient and modern, including many specialist units.
Metrication.com Information about the metric system including engineering data such as screw sizes. Links to on-line resources such as converters.
The Metric System info Has pages You can understand metric, How to learn the metric system, Metric 101 - Reference Points and Why Metric?
Team Metric A site maintained by and for educators, with some useful information on why it is important for America to move to the metric system.
Think Metric British site promoting the metric system with useful information on metric system basics, usage, the advantages of going metric and more.
Metrication Matters A collection of information by an Australian metrication advocate and educator, the late Pat Naughtin. There is a lot of practical information for using the metric system, training people to become metric users and converting to metric. All of it can be downloaded as PDFs. Please note that this is a mirror of the original Metrication Matters site which is no longer available. Some links and things like requests for the MM newsletter will not work. Emails sent to the site will not be replied to.
Metrication in Australia The final report of Australia's Metric Conversion Board describing the reasons for, and the process of effecting the metric conversion, 1972-82. (PDF document, 127 pages, 1.2MB)
The metric system on YouTube YouTube videos explaining the metric system.
The metric system on Pinterest Pictures and teaching aids for the metric system, all free.
Wikipedia The major online encyclopedia has articles on The Metric System; Opposition to the Metric System and Metrication in various countries.
RationalWiki is an online encyclopedia promoting rational thought. Its article on the Metric system debunks several of the arguments used against metrication.
Imperimetric An online, easy-to-use metric converter for recipes and other texts. Converts between metric, US, and Imperial measurements.
World Metric Map A map of the world showing the different degrees of metric use by country

#Blogs

A Mile Behind A blog discussing how America lags the rest of the world in metrication, and making a documentary about it.
The Metric Maven A blog highlighting America's long history of shunning the metric system and the difficulties caused by retaining US customary measurements.
Metric Pioneer A blog, information source, and online store for metric products.

#Metric Related Subs

We are always looking for more partners. Please send us a mod mail!

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