How many glasses is 64 ounces of water?
                                
                                
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                                    4 min read                                
                            
                                For decades, the standard advice to drink 'eight 8-ounce glasses' of water has become a household mantra, but surprisingly, there is no scientific basis for this specific guideline. The seemingly simple question, 'how many glasses is 64 ounces of water?' is actually more complex and depends on the specific volume of the glass you are using.