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Sixty-four fluid ounces is equivalent to half a gallon. One fluid ounce is equivalent to 1/128 of a gallon, or .0078125 gallons; therefore, 128 ounces equals exactly ... - read more

Answers.com > Wiki Answers > Categories > Science > Math and Arithmetic > 64 oz's equal how many gallons? ... 64 oz equals how many ... 128 ounces in 1 US gallon. Edit. - read more

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