- All Measures - http://www.allmeasures.com/
- Conversion table of non-metric measures into SI and CGS.
- 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.
- 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.
- 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.
- SI Units - http://www.chemie.fu-berlin.de/chemistry/general/si_en.html
- Reference information on the International System of Units (SI).
- Unit Conversions - http://www.chemie.de/tools/units.php3?language=e
- Online conversions from physics units to other physics units. Includes a comprehensive set of units with definitions.
- 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.
- SI Guide - http://www.metricmethods.com/siguidelines.html
- Provides translation of unit and prefix names for the international metric system (SI) into various languages. For some, transliterations are also given.
- IEER Technical Classroom - http://www.ieer.org/clssroom/unitconv.html
- Table of conversion factors for selected units relevant to nuclear topics.
- Temperature Converter - http://www.albireo.ch/temperatureconverter/
- Converts Fahrenheit to Celsius and vice versa.
- Units of Measurement - http://www.themeter.net/index_e.htm
- Conversions and equivalences of the principal units of measure of the SI and Anglo-Saxon systems.
- UK Metric Association - http://www.ukma.org.uk/
- Pressure group campaigning for the completion of metrication in the UK. History, legislation, and practical help.
- Metric Conversion Tables - http://www.metric-conversion-tables.com/
- Conversion factors and online calculators for metric and imperial units.
- Temperature Converter - http://www.ausmaps.com/converter.php
- Simple Celsius-Fahrenheit conversions.
- Anglo-Saxon Weights & Measures - http://members.aol.com/jack%20proot/met/spvolas.html
- Catalogue of traditional British units with historical notes.
- The Metric System - http://www.essex1.com/people/speer/metric.html
- Outline of the metric system with emphasis on applications in physics.
- British Weights and Measures Association (BWMA) - http://www.bwmaonline.com/
- Pressure group opposing compulsory metrication. Political, consumer and transport information, discussion boards and links.
- Metric Conversion Tables to Imperial Measurements - http://www.simetric.co.uk/
- Standard-to-metric conversion factor tables with definitions, derived units and prefixes.
- Allchin Measurements Converter - http://allchin.net/converter/
- Converts common measurements from metric to imperial and vice versa, with other systems included for selected quantities such as light years, picas, and Old Russian measures.
- Body Height Weight Converter - http://www.albireo.ch/bodyconverter/
- Converts from American to metric units and vice versa.
- Chinese Numbers - http://www.mandarintools.com/numbers.html
- Put in a number and get the Chinese representation of that number. Also, converts from Arabic numeral back to the Chinese form.
- GourmetSleuth - http://www.gourmetsleuth.com/general_calcs.htm
- Conversion calculators for distance, length, area, volume weights, and temperature.
- Convert-Me - http://www.convert-me.com
- Metric, English old Russian, ancient Greek and Roman, nautical, typographical and astronomical conversions.
- Measurement Units Translation - http://www.convert-me.com/en/
- Measurements converter for time, length, volume, and weight. Requires JavaScript.
- eFunda: Units and Constants - http://www.efunda.com/units/index.cfm
- The index page for units, fundamental constants, and currencies.
- EngNet Engineering Units Converter - http://www.engnetglobal.com/tips/convert.asp
- Online calculator provides conversions between a number of common (and not so common) units.
- Equatorial to Galactic Converter - http://fuse.pha.jhu.edu/support/tools/eqtogal.html
- Convert Equatorial to Galactic Coordinates.
- 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.
- GoConvert - http://www.goconvert.com/
- Convert currencies and measurements.
- Interactive Unit Equivalency Table Generator - http://www.triatek.com/triautil/unitconvtable.htm
- Generates an equivalency table from any engineering unit to any other.
- Math Connect - http://www.mathconnect.com
- Provides calculations of various types including metric conversion, engineering calculations, and computing finance loan payments. Also, has list of general math formulas.
- Measurement Unit Converter - http://www.people.virginia.edu/~rmf8a/convert.html
- Converts many units of measurement using a JavaScript 1.1 applet.
- MegaConverter - http://www.megaconverter.com/
- Resource for units, weights, measures, calculators and converters.
- Metric System Formulas - http://www.rocler.qc.ca/dusablon/wintips/
- Formulas for converting imperial system into metric system. Site in both English and French.
- 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.
- Convert It - http://www.convertit.com
- Features converter tools for measurement, currency exchange, world time zones, time, finance, driving distance, Roman numerals, atmosphere, and body mass index. Also, has a basic calculator and periodic table.
- MIT 3.091 Units Converter - http://web.mit.edu/course/3/3.091_dev/javaexamples/hello/unit-convert.html
- A tool for engineers and others to convert from almost any set of units to any other.
- Online Conversion - http://www.onlineconversion.com/
- Offers conversion tools for length, volume, temperature, astronomical, clothing sizes, computer bytes, cooking measurements, time zones, density, energy, finance, flow rates, force frequency, and some fun pages.
- Online Converters - http://onlineconverters.com
- Provide online javascript converters and calculators for converting metric to imperial units and vice-versa.
- Cleave Books - Specialist Calculators - http://www.projects.ex.ac.uk/trol/scol/
- Features converters for perimeter measurements of geometric figures, fractions, percentages, number bases, loan repayments, growth and decay, cost of living index, fuel consumption, flow rate, specific energy, viscocity, and heat capacity.
- Ron's Hard Conversion Tools - http://www.ronshardwebapps.com/conversions.asp
- Online unit conversion calculators for volume, distance, weight, and temperature units. Also includes number conversion (decimal, hex, and binary) and a tool to convert characters to or from ASCII codes.
- Metric Conversions - http://www.sciencemadesimple.com/conversions.html
- Online calculator converts between metric, British, and American units.
- Unit conversion and Reference Tables - http://www.chemie.fu-berlin.de/chemistry/general/index_en.html
- Features converters for physical constants, SI units, temperature, currency, and temperature.
- Unit Converters - http://www.scorpiosite69.freeserve.co.uk/conversions.htm
- Features conversion calculators for atmospheric pressure, volume, distance, weight, velocity, temperature, and force.
- World Wide Metric - http://www.worldwidemetric.com/metcal.htm
- Java metric conversion calculator for length, weight, pressure, and volume.
- WWW Unit Converter - http://www.digitaldutch.com/unitconverter/
- Converts area, density, energy, force, length, mass, power, pressure, speed, temperature and volume, bits and bytes.
- Conversion Tables - http://www.conversiontables.info
- More than 40 different unit conversion tables.
- Conversions-R-Us - http://freegroups.net/conversion/
- Convert units of measurements, bases, and PPT, RTF, DOC, and XLS files to HTML.
- iAgora Conversions - http://www.iagora.com/itravel/tools/
- Converts temperature, currency, length, and mass.
- Unit Conversion and Day of the Week - http://scphillips.com/units//index.html
- Converts such things as inches to centimetres, gallon to cubic metres or even curie to becquerel
- National Weights and Measures Laboratory (UK) - http://www.nwml.gov.uk/faqs.aspx?id=8
- Official imperial-to-metric conversion tables.
- Measuring Low Concentrations - http://www.cefic.org/metricscale/low_concentration.htm
- Explains with many examples the question of "What do ppm, ppb, ppt and ppq stand for?"
- The Scale of Things - http://www.cefic.org/metricscale/scale.htm
- Illustrated examples of sizes in the metric system, from ters- to pico-.
- The Modern Metric System - http://metre.info/
- Dictionary of metric units explaining the principles and history of the system.
- On-Line Measures Converter - http://amedvedev.chat.ru/
- Length, area, mass and weight, volume and capacity, temperature, angles, force, torque, electricals, cloth sizes, and some others.
- NIST Metric Information and Conversions - http://ts.nist.gov/weightsandmeasures/metric/mpo_home.cfm
- Factsheets, regulations and conversion tools. Official site of the United States Metric Program.
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