There are 128 fluid ounces in one gallon of water in the system of measurement used by the United States. By definition, a fluid ounce is 1/16 of a pint, and there are eight pints in a gallon. More »

There are 128 U.S. fluid ounces in a U.S. gallon of water. Furthermore, there are 160 imperial fluid ounces in an imperial gallon. The U.S. ounce and gallon are used in the United States, while the imperial versions of t... More » Math Arithmetic

There are four quarts in a gallon, assuming that one is using U.S. quarts and U.S. gallons. However, the ratio varies if using non-US units of measurement. More » Science Measurements

As of 2014, the United States, Liberia and Myanmar are the only three countries that still use the customary system of measurement instead of the metric system. This system, based on the old British Imperial System, is a... More »

There are 128 fluid ounces in 1 gallon. It’s important to know the different liquid measurement conversion factors that relate ounces, quarts, cups and gallons. More » Science Measurements

A gallon is a standard unit of measurement used to measure liquids, while a pound measures mass; it is not possible to convert between the two because they measure two different things. To calculate the weight of a gallo... More » Science Measurements

There are 64 fluid ounces in a half gallon. Both measurements are units of volume in the imperial system, widely used in the United States for cooking and other tasks. More » Science Measurements