Subject Guides     

Converters     

Currency

  • FXConverter - 164 Currency Converter (OANDA.com)
    • Current and historical exchange rates from 1990 to present. Multiple rate types. Also available in French, German, Italian, Swedish and Portuguese.
  • FXHistory: historical currency exchange rates (OANDA.com)
    • Retrieves multiple historical daily average exchange rates. Multiple rate types. Goes back 3 years.  Also available in French, German, Italian, Swedish and Portuguese.
  • Universal Currency Converter (Xenon Laboratories)
    • Rates updated about every fifteen minutes, but does not specify which rate is used. Also available in French, Swedish and Spanish.

Temperature

Unit

  • Conversion of Units (Institute of Chemistry, Freie Universitat Berlin)
    • Long list of units. Excellent site.