McDonald's Mega Mac - How Many Calories?

Reviewed by Dyt. Şeyda Ertaş, Registered Dietitian Last updated: January 4, 2026

McDonald's Mega Mac

~262.6 g

Calculated from the 100 g values. ~ indicates an estimated serving weight.

McDonald's Mega Mac image
730kcal
Carbohydrate47.8 g %26
Protein34.4 g %19
Fat42.5 g %52

McDonald's Mega Mac Nutrition Values

Nutrients100 gr1 Piece
Calories(kcal)278730
Carbohydrate (g)18.247.79
Protein (g)13.134.4
Fat (g)16.242.54
Fiber (g)1.53.94
Cholesterol (mg)52136.55
Sodium (mg)4301129.18
Potassium (mg)245643.37
Calcium (mg)110288.86
Iron (mg)2.46.3
Vitamin A (IU)180472.68
Vitamin C (mg)1.23.15

Values are calculated from a 100 g basis. The product, recipe and edible serving weight can change the result. See the food-specific notes below for the reference used.

Dietitian's Tips for Consuming McDonald's Mega Mac

  • Metabolic Effect: It has a high-calorie and fatty content, which provides quick energy but can rapidly raise blood sugar and does not provide long-lasting satiety. The trans fats and additives it contains may have negative effects on metabolism.
  • Consumption Recommendation: If possible, smaller portions should be preferred, and fiber intake should be increased by consuming plenty of vegetables or salad alongside it. Instead of consuming it alone, it should be considered as part of a balanced meal.
  • Things to Consider: Regular consumption can lead to weight gain and heart health problems. One Mega Mac can meet a significant portion of your daily calorie needs, so it should not be consumed frequently.
  • Exercise Equivalent: To burn the calories from one Mega Mac, you may need to walk briskly for about 1 hour and 45 minutes. This may vary depending on your activity level and metabolism.