How Many Cups Is 3 Liters of Water a Day? The Complete Hydration Guide
                                
                                
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                                    4 min read                                
                            
                                The Institute of Medicine recommends approximately 3 liters (about 13 cups) of daily fluid intake for men. But for many, the simple question of how many cups is 3 liters of water a day can be confusing, especially with varying cup sizes and conversion standards. This guide clarifies the conversion and discusses personal hydration needs.