How many carbs are in a Big Mac?
A 1 burger (219g) serving of Big Mac contains 45g of total carbs (42g net carbs), 9g sugar, 563 calories, 26g protein, 33g fat and 3g fiber.
- Calories
- 563 cal
- Carbohydrates
- 45 g
- of which Sugars
- 9 g
- Fiber
- 3 g
- Net carbs
- 42 g
- Protein
- 26 g
- Fat
- 33 g
Big Mac nutrition at a glance
Per 1 burger (219g), Big Mac delivers about 28% of a 2,000-calorie daily reference, 16% of the 275g daily carbohydrate reference and 11% of the 28g daily fiber reference. Sugar sits at 18% of the 50g added-sugar reference and protein contributes 52% of the 50g protein reference.
- Calories
- 257
- Carbs
- 20.5 g
- Sugar
- 4.1 g
- Protein
- 11.9 g
- Fat
- 15.1 g
- Fiber
- 1.4 g
Blood-sugar impact of Big Mac
The fiber content slows glucose absorption, so the real glycemic impact is lower than the raw carb count suggests. A good option for steady energy.
With 45g total carbs and 3g fiber, the net-carb figure for a 1 burger (219g) serving works out to roughly 42g — this is the number most keto and low-carb tracking apps use. If you're managing type 2 diabetes, pre-diabetes or reactive hypoglycemia, use total carbs for insulin dosing calculations and treat net carbs as a rough guide for meal planning.
Ways to eat Big Mac
- Treat big mac as your main carb source for the meal — skip additional bread, rice or pasta on the side.
- Split a full serving of big mac into two smaller portions to keep post-meal glucose steadier.
- Pair big mac with 20–30g of protein and some healthy fat to flatten the blood-sugar response.
Frequently asked questions
Is Big Mac keto-friendly?
Not really. 42g net carbs per 1 burger (219g) exceeds a full-day keto allowance for most people. It's a much better fit for a low-carb (100–150g/day) or balanced plan.
How many carbs in Big Mac per 100 grams?
About 20.5g of carbs, 4.1g sugar and 257 calories per 100g of Big Mac.
How does Big Mac affect blood sugar?
The fiber content slows glucose absorption, so the real glycemic impact is lower than the raw carb count suggests. A good option for steady energy.
Is Big Mac good for weight loss?
A serving delivers 563 calories with 26g protein and 3g fiber. Foods that are relatively high in protein and fiber per calorie tend to be more filling — with a 5% combined protein-plus-fiber-to-calorie ratio, Big Mac is a solid pick for a satiating, weight-loss-friendly meal.
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Open scannerSources & how these numbers are calculated
Nutrition values are consensus averages compiled from the USDA FoodData Central database for a typical 1 burger (219g) serving of Big Mac. Actual values vary with brand, variety, ripeness and preparation — always check the label on packaged products. Daily-value percentages reference the U.S. FDA 2,000-calorie adult reference (275g carbs, 50g added sugar, 50g protein, 78g fat, 28g fiber).
Content reviewed by Carb Lens editorial. Read our editorial policy for how we source, review and update food data.