Calculators
Calcoolator: Online calculator.
Online Conversion: Convert just about anything to anything else.
Roman Numerals and Date Conversion
Unit converter: Everything from angstroms and ells to parsecs and yards.
Google will also do many calculations, including most mathematical formulas, adding, multiplying, metric, binary or Roman numeral conversions, and currency conversions. Just type your question (such as "100 miles in kilometers" or "45 in hexadecimal") in the search box. There is more information here.
