A Dictionary of Measures
This is a very useful site that has many more measurements and conversion factors than we introduced in the text, but nevertheless, it is a site which you may find very useful.
http://www.ex.ac.uk/cimt/dictunit/dictunit.htm

Volume-Capacity Conversion Tool
This site converts from one measurement to another.
http://amedvedev.chat.ru/length.htm

Metric & U.S. Measurement Systems
This interactive site converts from one unit of measurement to another.
http://www.sciencemadesimple.com/conversions.html