How Many Calories Are in a Large Slushie?
                                
                                
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                                    5 min read                                
                            
                                According to nutritional data, a large 7-Eleven Coke Slurpee (28 oz) contains 244 calories, derived almost entirely from its sugar content. The exact number of calories in a large slushie, however, varies significantly based on the brand, flavor, and serving size, which can range from under 300 to over 1000 calories.