Converting Different Units of Measure
It may be necessary to convert different units of measure, especially when preparing recipes from international cookbooks. The three basic measuring systems most commonly used are the U.S. system, the British Imperial system for liquid, and the Metric system. There are basic formulas that can be used to convert a measurement from one system to that of another.
Converting U.S. Liquid Measurements to British Liquid Measurements
If a person in Britain were preparing a dish from a recipe in an American cookbook, that person would have to use American measuring tools to measure liquids or would have to convert American liquid measurements to British. To convert American fluid ounces to British fluid ounces, multiply the American ounces by 1.04. It is also important to keep in mind that American and British fluid pints are the same in name only. An American fluid pint contains 16 American ounces while a British fluid pint contains 20 British ounces. If the American recipe called for a pint of a liquid, it would be equal to approximately 15 1/3 British fluid ounces.
Converting British Liquid Measurements to U.S. Liquid Measurements
If a person in America were preparing a dish from a recipe in a British cookbook, that person would have to use British measuring tools to measure liquids or would have to convert British liquid measurements to American. To convert British fluid ounces to American fluid ounces, divide the British ounces by 1.04. It is also important to keep in mind that British and American fluid pints are the same in name only. A British fluid pint contains 20 British ounces while an American fluid pint contains 16 American ounces. If the British recipe called for a pint of a liquid, it would be equal to approximately 1 1/3 American fluid pints.
Note: Dry measures in ounces and pounds and linear measures in inches and feet are the same in the American and British systems. 
Converting U.S. Measurements to Metric Measurements
Length:
 To convert inches to centimeters, multiply the number of inches by 2.54.
 To convert feet to meters, divide the number of feet by 3.28.
 To convert miles to kilometers, multiply the number of miles by 1.609.
Weight:
 To convert ounces to grams, multiply the number of ounces by 28.35.
 To convert pounds to kilograms, divide the number of pounds by 2.205.
Liquid Measure:
 To convert ounces to milliliters, multiply the number of ounces by 29.573.
 To convert ounces to liters, divide the number of ounces by 33.815.
 To convert pints to liters, divide the number of pints by 2.114.
 To convert quarts to liters, divide the number of quarts by 1.057.
Converting Metric Measurements to U.S. Measurements
Length:
 To convert centimeters to inches, divide the number of centimeters by 2.54.
 To convert meters to feet, multiply the number of meters by 3.28.
 To convert kilometers to miles, divide the number of kilometers by 1.609.
Weight:
 To convert grams to ounces, divide the number of grams by 28.35.
 To convert kilograms to pounds, multiply the number of kilograms by 2.205.
Liquid Measure:
 To convert milliliters to ounces, divide the number of milliliters by 29.573.
 To convert liters to ounces, multiply the number of liters by 33.815.
 To convert liters to pints, multiply the number of liters by 2.114.
 To convert liters to quarts, multiply the number of liters by 1.057.
