Directory of Units of Measurement Resources

Online calculators and other resources for converting one unit of measurement into another.

Resources in This Category

Offers a wide variety of unit conversion tools and conversion charts for fast lookup.

• British Weights and Measures Association (BWMA)

http://www.bwmaonline.com/
Pressure group opposing compulsory metrication. Political, consumer and transport information, discussion boards and links.

• Conversion Factors for Energy Equivalents

http://physics.nist.gov/cuu/Constants/energy.html
Physics laboratory of the National Institute of Standards and Technology (NIST) sponsors and maintains this reference resource of CODATA-recommended values of fundamental physical restraints.

• English Weights and Measures

http://home.clara.net/brianp/index.html
History and usage of English/Imperial/customary weights and measures, with conversion factors, and pictures. Minims, drachms, pecks, bushels, rods, poles, perches, furlongs, ounces, fathoms, pints, gallons, nails, chains, chaldrons, tods, crowns, florins, groats, farthings and guineas.

• How Many?

http://www.unc.edu/~rowlett/units/index.html
A dictionary of units of measurement: explanations of the metric system, System Internationale (SI), English customary system, and other modern measuring systems. Plus extensive links to other measurement-related Internet resources.

• International System of Units

http://physics.nist.gov/cuu/Units/index.html
Definitions of SI units and SI prefixes, units outside the SI, rules and style conventions, historical context for SI units, international aspects of the SI, and unit conversions.

• Metric 4 US

http://www.metric4us.com/
A site promoting the metric system which argues why metric is better and English is worse. Provides an English-metric online calculator.

• Metric Conversion Tables to Imperial Measurements

http://www.simetric.co.uk/
Standard-to-metric conversion factor tables with definitions, derived units and prefixes.

• National Measurement and Regulation Office (UK)

https://www.gov.uk/government/organisations/national-measurement-office
Includes information about the National Measurement System, legislation and guidance, services to industry, and its enforcement role.

• SI Units, Conversion and Measurement Skills

http://www.wacek.co.za/
Book by Wacek Kijewski on experimental science in metric units. Includes problems, guided solutions, fun facts, data handling and metric conversion tests.

• The Foot Rule

http://www.footrule.com/
Convert units from one measure to another (e.g. meters to yards, liters to gallons). A very extensive collection of units and categories. Includes usage and definitions descriptions of units and categories.

• UK Metric Association

http://ukma.org.uk/
Pressure group campaigning for the completion of metrication in the UK. History, legislation, and practical help.

• Units of Measurement

http://www.themeter.net/index_e.htm
Conversions tables and equivalences of the principal units of measure of the SI and Anglo-Saxon systems.

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