All Measures
   Conversion table of non-metric measures into SI and CGS.
   http://www.allmeasures.com/

Allchin Measurements 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.
   http://allchin.net/converter/

Body Height Weight Converter
   Converts from American to metric units and vice versa.
   http://www.albireo.ch/bodyconverter/

British Weights and Measures Association (BWMA)
   Pressure group opposing compulsory metrication. Political, consumer and transport information, discussion boards and links.
   http://www.bwmaonline.com/

Chinese Numbers
   Put in a number and get the Chinese representation of that number. Also, converts from Arabic numeral back to the Chinese form.
   http://www.mandarintools.com/numbers.html

Cleave Books - Specialist Calculators
   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.
   http://www.projects.ex.ac.uk/trol/scol/

Conversion Factors for Energy Equivalents
   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.
   http://physics.nist.gov/cuu/Constants/energy.html

Conversion Table of Non-Metric measures into SI and CGS
   Conversion of non-metric measures into SI (meter-kilogram-second) and CGS (centimeter-gram-second).
   http://n93.cs.fiu.edu/measures/

Conversion Tables
   More than 40 different unit conversion tables.
   http://www.conversiontables.info

Conversions-R-Us
   Convert units of measurements, bases, and PPT, RTF, DOC, and XLS files to HTML.
   http://freegroups.net/conversion/

Convert It
   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.
   http://www.convertit.com

Convert-Me
   Metric, English old Russian, ancient Greek and Roman, nautical, typographical and astronomical conversions.
   http://www.convert-me.com

EngNet Engineering Units Converter
   Online calculator provides conversions between a number of common (and not so common) units.
   http://www.engnetglobal.com/tips/convert.asp

English Weights and Measures
   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,
   http://home.clara.net/brianp/index.html

Equatorial to Galactic Converter
   Convert Equatorial to Galactic Coordinates.
   http://fuse.pha.jhu.edu/support/tools/eqtogal.html

GoConvert
   Convert currencies and measurements.
   http://www.goconvert.com/

GourmetSleuth
   Conversion calculators for distance, length, area, volume weights, and temperature.
   http://www.gourmetsleuth.com/general_calcs.htm

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.
   http://www.unc.edu/~rowlett/units/index.html

IEER Technical Classroom
   Table of conversion factors for selected units relevant to nuclear topics.
   http://www.ieer.org/clssroom/unitconv.html

Interactive Unit Equivalency Table Generator
   Generates an equivalency table from any engineering unit to any other.
   http://www.triatek.com/TriaUtil/unitconvtable.htm

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.
   http://physics.nist.gov/cuu/Units/index.html

MIT 3.091 Units Converter
   A tool for engineers and others to convert from almost any set of units to any other.
   http://web.mit.edu/course/3/3.091_dev/javaexamples/Hello/unit-convert.html

Math Connect
   Provides calculations of various types including metric conversion, engineering calculations, and computing finance loan payments. Also, has list of general math formulas.
   http://www.mathconnect.com

Measurement Conversion
   Convert volume (capacity), weight, length, area, temperature, pressure, torque, power and energy measures between U.S./Imperial and SI (Metric) units. Requires JavaScript.
   http://hemsidor.torget.se/users/b/bohjohan/convert/conv_e.htm

Measurement Unit Converter
   Converts many units of measurement using a JavaScript 1.1 applet.
   http://www.people.virginia.edu/~rmf8a/convert.html

Measurement Units Translation
   Measurements converter for time, length, volume, and weight. Requires JavaScript.
   http://www.convert-me.com/en/

Measuring Low Concentrations
   Explains with many examples the question of "What do ppm, ppb, ppt and ppq stand for?"
   http://www.cefic.org/metricscale/low_concentration.htm

MegaConverter
   Resource for units, weights, measures, calculators and converters.
   http://www.megaconverter.com/

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.
   http://www.metric4us.com/

Metric Conversion Tables
   Conversion factors and online calculators for metric and imperial units.
   http://www.metric-conversion-tables.com/

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

Metric Conversions
   Online calculator converts between metric, British, and American units.
   http://www.sciencemadesimple.com/conversions.html

Metric System Formulas
   Formulas for converting imperial system into metric system. Site in both English and French.
   http://www.rocler.qc.ca/dusablon/wintips/

NIST Metric Information and Conversions
   Factsheets, regulations and conversion tools. Official site of the United States Metric Program.
   http://ts.nist.gov/WeightsAndMeasures/Metric/mpo_home.cfm

National Weights and Measures Laboratory (UK)
   Official imperial-to-metric conversion tables.
   http://www.nwml.gov.uk/faqs.aspx?ID=8

On-Line Measures Converter
   Length, area, mass and weight, volume and capacity, temperature, angles, force, torque, electricals, cloth sizes, and some others.
   http://amedvedev.chat.ru/

Online Conversion
   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.
   http://www.onlineconversion.com/

Online Converters
   Provide online javascript converters and calculators for converting metric to imperial units and vice-versa.
   http://onlineconverters.com

Ron's Hard Conversion Tools
   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.
   http://www.ronshardwebapps.com/conversions.asp

SI Guide
   Provides translation of unit and prefix names for the international metric system (SI) into various languages. For some, transliterations are also given.
   http://www.metricmethods.com/SIguidelines.html

SI Units
   Reference information on the International System of Units (SI).
   http://www.chemie.fu-berlin.de/chemistry/general/si_en.html

Temperature Converter
   Simple Celsius-Fahrenheit conversions.
   http://www.ausmaps.com/converter.php

The Foot Rule
   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.
   http://www.footrule.com/

The Metric System
   Outline of the metric system with emphasis on applications in physics.
   http://www.essex1.com/people/speer/metric.html

The Modern Metric System
   Dictionary of metric units explaining the principles and history of the system.
   http://metre.info/

The Scale of Things
   Illustrated examples of sizes in the metric system, from ters- to pico-.
   http://www.cefic.org/metricscale/scale.htm

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

Unit Conversion and Day of the Week
   Converts such things as inches to centimetres, gallon to cubic metres or even curie to becquerel
   http://scphillips.com/units//index.html

Unit Conversions
   Online conversions from physics units to other physics units. Includes a comprehensive set of units with definitions.
   http://www.chemie.de/tools/units.php3?language=e

Unit conversion and Reference Tables
   Features converters for physical constants, SI units, temperature, currency, and temperature.
   http://www.chemie.fu-berlin.de/chemistry/general/index_en.html

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

WWW Unit Converter
   Converts area, density, energy, force, length, mass, power, pressure, speed, temperature and volume, bits and bytes.
   http://www.digitaldutch.com/unitconverter/

World Wide Metric
   Java metric conversion calculator for length, weight, pressure, and volume.
   http://www.worldwidemetric.com/metcal.htm

eFunda: Units and Constants
   The index page for units, fundamental constants, and currencies.
   http://www.efunda.com/units/index.cfm

iAgora Conversions
   Converts temperature, currency, length, and mass.
   http://www.iagora.com/itravel/tools/