Over 5,000 units, and 50,000 conversions
Convert
It!
Multiple conversions, table-based
Google
Combine the new and expanding list of features,
including unit conversion, maps and more with tools
like the Google browser buttons or toolbar for quick conversion and reference.
NIST Time
& Frequency Division
National Institute of Standards & Technology
Periodic Table
of the Elements
Los Alamos National Laboratory interactive table
The Official U.S. Time
NIST & USNO Java-enhanced time display
Time Service Department
U.S. Naval Observatory time services
Universal Currency Converter
Performs currency conversions between many worldwide standards
www.timeanddate.com
Time and calendar resource; has a good World Clock