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

Temperature Converter
Simple Celsius-Fahrenheit conversions.

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

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

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

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

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

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