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  1. All Measures - Conversion table of non-metric measures into SI and CGS.
  2. British Weights and Measures Association - The site for traditional and useful British measurements.
  3. Calcula - Compound unit calculator and converter. Interface with GNU source code available. In both Spanish (Castellano) and English.
  4. Calculate for Free - Very wide variety of calculators for determining an array of metrics and measurements.
  5. Calculator.com - Online calculators for a variety of conversions and calculations.
  6. A Dictionary of Units - A summary of most of the units of measurement to be found in use around the world today (and a few of historical interest), together with the appropriate conversion factors needed to change them into a 'standard' unit of the S I.
  7. English Weights and Measures - History and usage of English/Imperial/customary weights and measures, with conversion factors, pictures etc. Minims, drachms, pecks, bushels, rods, poles, perches, furlongs, ounces, fathoms, pints, gallons, nails, chains, chaldrons, tods, crowns, florins, groats, farthings and guineas - you will find them all here!
  8. How Many? - 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.
  9. IEER Technical Classroom - Table of conversion factors for selected units relevant to nuclear topics.
  10. International System of Units - 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.
  11. GoConvert - A comprehensive and high-speed site for conversion calculations. Convert 165 currencies and hundreds of measurements.
  12. Metric 4 US - A site promoting the metric system which argues why metric is better and English is worse. Provides an English-metric online calculator.
  13. Science Made Simple - Online metric converter gives U.S. customary and metric conversions.
  14. SI Guide - Provides translation of unit and prefix names for the international metric system (SI) into various languages. For some, transliterations are also given.
  15. SI Units - Reference information on the International System of Units (SI).
  16. Unit Conversions - Online conversions from physics units to other physics units. Includes a comprehensive set of units with definitions.
  17. United Kingdom Metrication - History and legislation.

 

 


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