Calories in Big Mac (McDonald's)
Calories, protein, carbohydrate and fat per 100 g and per serving, from the USDA reference database — plus what actually changes the number on your plate.
Short answer
100 g of Big Mac (McDonald's) contains 257 kcal, with 11.8 g of protein, 20.1 g of carbohydrate and 15 g of fat.
A typical serving — 1 whole, about 219 g — is roughly 563 kcal.
That is a fairly calorie-dense food, so portion size matters.
Nutrition facts
| Nutrient | Per 100 g | 1 whole (219 g) |
|---|---|---|
| Calories | 257 kcal | 563 kcal |
| Protein | 11.8 g | 25.9 g |
| Carbohydrates | 20.1 g | 44 g |
| Sugars | 4 g | 8.7 g |
| Fibre | 1.6 g | 3.5 g |
| Fat | 15 g | 32.8 g |
| Saturated fat | 3.8 g | 8.3 g |
| Cholesterol | 36 mg | 79 mg |
| Sodium | 460 mg | 1,007 mg |
| Potassium | 181 mg | 396 mg |
| Calcium | 116 mg | 254 mg |
| Iron | 2 mg | 4.4 mg |
| Vitamin C | 0.4 mg | 0.9 mg |
| Water | 51 g | 112 g |
Calories per serving
| Serving | Weight | Calories | Protein | Carbohydrates | Fat |
|---|---|---|---|---|---|
| 1 whole | 219 g | 563 | 25.9 g | 44 g | 32.8 g |
Photograph it instead of looking it up
Wellix identifies Big Mac on your plate, estimates the portion and logs calories, protein, carbs and fat in seconds. Free to start on iPhone and Android.
Calories by weight
Use this table when you know the weight but not the serving:
| Amount | Calories | Protein | Carbohydrates | Fat |
|---|---|---|---|---|
| 25 g | 64 | 3 g | 5 g | 3.7 g |
| 50 g | 129 | 5.9 g | 10 g | 7.5 g |
| 100 g | 257 | 11.8 g | 20.1 g | 15 g |
| 150 g | 386 | 17.7 g | 30.1 g | 22.4 g |
| 200 g | 514 | 23.6 g | 40.2 g | 29.9 g |
| 250 g | 643 | 29.6 g | 50.2 g | 37.4 g |
| 300 g | 771 | 35.5 g | 60.2 g | 44.9 g |
Where the calories come from
Calories come from three macronutrients: protein and carbohydrate at 4 kcal per gram, fat at 9 kcal per gram. For Big Mac (McDonald's) the split is:
- Protein: 11.8 g × 4 = 47 kcal — 18% of calories
- Carbohydrates: 20.1 g × 4 = 80 kcal — 31% of calories
- Fat: 15 g × 9 = 135 kcal — 51% of calories
- Most of the energy in Big Mac (McDonald's) comes from fat (51% of calories).
- For 200 kcal you can eat about 80 g.
What actually changes the number
A Big Mac is 257 kcal per 100 g and 563 kcal in total per USDA analysis — the chain's own figure is close, at around 550. The sauce and the middle bun are what set it apart from a double cheeseburger.
How accurate are these numbers?
The values on this page are reference averages from the USDA FoodData Central database (SR Legacy release), measured on samples of Big Mac as sold and prepared in the United States. Your portion will differ: produce varies by variety and ripeness, meat by cut and trim, and anything cooked by the fat and water it gained or lost.
For most foods the per-100 g figure is reliable to within about 10%. The larger uncertainty is almost always the weight of what is on your plate and the cooking fat you cannot see — the two things worth checking before you worry about the database.
How accurate are AI calorie counting apps? →
Related foods
More in Fast food and prepared meals →
Frequently asked questions
How many calories are in 100 g of Big Mac?
100 g of Big Mac (McDonald's) contains 257 kcal (11.8 g protein, 20.1 g carbohydrate, 15 g fat), according to USDA reference data.
How many calories are in a serving of Big Mac?
A typical serving of Big Mac — 1 whole, about 219 g — has roughly 563 kcal. Weigh your own portion once to see how it compares; serving sizes vary more than the food does.
How much protein is in Big Mac?
Big Mac (McDonald's): 11.8 g of protein per 100 g, which is moderate. Foods above about 15–20 g per 100 g, or where protein supplies a third or more of the calories, are usually considered high-protein.
What amount of Big Mac equals 200 kcal?
At 257 kcal per 100 g, about 80 g of Big Mac equals 200 kcal.
Can I track Big Mac by taking a photo?
Yes. A photo calorie app like Wellix identifies Big Mac on the plate and estimates the portion from the image. The estimate is most accurate when you confirm the weight or the count, and tell the app about anything the camera cannot see — cooking oil, butter, dressings and sauces.
Source
Nutrition data: U.S. Department of Agriculture, FoodData Central — SR Legacy, FDC ID 170720: "McDONALD'S, BIG MAC". Values are per 100 g of edible portion. Serving weights are USDA household measures or typical retail sizes; check the label where one exists. View the USDA record.
Wellix provides general nutrition information and is not medical advice. Nutrition values are reference averages and individual foods vary. Consult a qualified healthcare professional before making significant dietary changes.
Photograph it instead of looking it up
Wellix identifies Big Mac on your plate, estimates the portion and logs calories, protein, carbs and fat in seconds. Free to start on iPhone and Android.
