1) Conversion of Units This site originates at the Institute of Chemistry, Department of Biology, Chemistry and Pharmacy, Freie Universitat, Berlin, Germany. It includes both chemistry and temperature conversions, general chemistry physical constants, and SI (Systeme International d'unites) units.

2) A Dictionary of Units This provides a summary of most of the units of measurement to be found in use around the world today (and a few of historical interest), together with the appropriate conversion factors needed to change them into a 'standard' unit of the SI.

3) A Dictionary of Units of Measurement This site provides detalied descriptions of units of measurement, many historical.

4) Home Depot's Calculator This site will help you calculate how much material you will need for home projects, e.g., the amount of paint you will need for walls, carpeting, drywall, etc.

5) Interactive Units Converter The site provides interactive calculators based on many measurement systems, both commonly used and historic.

6) Martindale's Calculators On-Line Center This site is part of the Martindale's comprehensive reference desk. Calculators deal with such general topics as agriculture, cooking, automobile and truck pricing, to such specifics as time to transmit kilobytes or megabytes or World Daily Reports (Time, Ships, Orchestras, Weather, etc.).

7) The Universal Currency Converter ®, the world's most popular currency tool, allows you to perform interactive foreign exchange rate calculations on the Internet, using live, up-to-the-minute currency rates.