Conversion Tables
More than 40 different unit conversion tables.

All Measures
Conversion table of non-metric measures into SI and CGS.

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.

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.

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, groats, farthings and guineas.

SI Units
Reference information on the International System of Units (SI).

Unit Conversions
Online conversions from physics units to other physics units. Includes a comprehensive set of units with definitions.

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.

SI Guide
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
Table of conversion factors for selected units relevant to nuclear topics.

Temperature Converter
Converts Fahrenheit to Celsius and vice versa.

Units of Measurement
Conversions and equivalences of the principal units of measure of the SI and Anglo-Saxon systems.

NIST Metric Information and Conversions
Factsheets, regulations and conversion tools. Official site of the United States Metric Program.

National Weights and Measures Laboratory (UK)
Official imperial-to-metric conversion tables.

The Modern Metric System
Dictionary of metric units explaining the principles and history of the system.

UK Metric Association
Pressure group campaigning for the completion of metrication in the UK. History, legislation, and practical help.

Metric Conversion Tables
Conversion factors and online calculators for metric and imperial units.

Temperature Converter
Simple Celsius-Fahrenheit conversions.

Anglo-Saxon Weights & Measures
Catalogue of traditional British units with historical notes.

The Metric System
Outline of the metric system with emphasis on applications in physics.

British Weights and Measures Association (BWMA)
Pressure group opposing compulsory metrication. Political, consumer and transport information, discussion boards and links.

Metric Conversion Tables to Imperial Measurements
Standard-to-metric conversion factor tables with definitions, derived units and prefixes.