How many mL is 8 oz of liquid water? The definitive conversion guide
                                
                                
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                                    4 min read                                
                            
                                According to the National Institute of General Medical Sciences, a standard cup in the US is defined as 8 fluid ounces, which is equivalent to approximately 237 milliliters. This article provides a definitive answer to the question, 'How many mL is 8 oz of liquid water?', and explains the conversion process clearly.