When I need to do a quick conversion, I look no further then my web browser and google.com. Simply enter the amount you wish to convert and what you would like to convert to in the search box. Example: Type "5 kilos to pounds" at the top of Google's search results. It gives you the conversion "5 kilograms = 11.0231131 pounds".
Equivalent measures are a handy reference to keep in your cookbook, especially if you are an empty nester trying to halve recipes you have used for years.
Need to change from U.S. to Metric or Metric to U.S.? Also conversion equivalents like how many teaspoons in a tablespoon.