If a water bottle says 20 fluid ounces, how many ounces are there?

I want to drink eight 8 ounce glasses of water a day. If i have an aquafina bottle that says 20 fluid ounces, how many bottles of aquafina must I drink?

They make a distinction because ounce can be weight or it can be a fluid portion. For fluids 8 ounces = 1 cup = 1 serving, 128 ounces or 16 cups per gallon. For weight it takes 16 ounces to equal a pound.

Aparently they don’t want people that are too stupid to know the difference between fluid ounces and weight ounces to think that they should be getting 1.25 pounds of water and then try to sue the company.

In this case 20 fluid ounces equals 2.5 servings or glasses. So 3 bottles will equal 7.5 glasses. However just getting 8 glasses may not be enough. That is old and inaccurate information. We need 1 ounce per 2 pounds of body weight and 8 more ounces for every 20 minute of exercise. With warm/dry days and climates ever more will be needed.

Though we can get some water in foods and other drinks keep in mind that alcohol and caffeine both dehydrate us.

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