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USDA guidelines count 1 cup (8 fluid ounces) as a serving. There are 16 cups in a gallon. Countries other than the US may have different official guidelines.

A portion is different from a serving and is usually defined as what would be a reasonable amount to consume at one meal. A child may drink a single serving at a meal but a teenager or adult may consume 2 servings in order to consume enough nutrients for the day. It's important to consider how much your family typically consumes if you're planning meals or making a grocery list.

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11y ago
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12y ago

16 1 cup servings.

1 gallon = 16 cups

1 cup =0.23 gallon

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