Carbs in McDonald's Big Mac
How many carbs are in mcdonald's big mac?
McDonald's Big Mac has 19.7g net carbs per 100g — 21.1g total carbs minus 1.4g fiber — plus 11.7g protein, 14.1g fat, and 258 calories. 1 burger (213g) works out to about 42g net carbs and 550 calories. That makes mcdonald's big mac moderate in net carbs and about average for the typical fast-food item, which averages about 27.6g net carbs per 100g. At this carb count, mcdonald's big mac is best limited to small portions on keto (usually 20–50g net carbs per day). Values are per per 100 g, sourced from Manufacturer-reported values; net carbs are computed by CarbMeNot.
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Free · no signup · ★ 4.7Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 1 burger | 42g | 44.9g | 24.9g | 550 |
| 100 g (3.5 oz) | 19.7g | 21.1g | 11.7g | 258 |
| 1 oz (28 g) | 5.5g | 5.9g | 3.3g | 72 |
How many calories are in mcdonald's big mac?
McDonald's Big Mac has 258 calories per 100g. 1 burger (213g) has about 550 calories. That's alongside 11.7g protein, 14.1g fat, and 19.7g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 258 |
| Total carbs | 21.1g |
| Net carbs | 19.7g |
| Fiber | 1.4g |
| Sugar | 4.2g |
| Sugar alcohols | 0g |
| Protein | 11.7g |
| Fat | 14.1g |
| Sodium | 474mg |
| Potassium | 0mg |
Source: Manufacturer-reported values (fast-food). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in mcdonald's big mac?
- McDonald's Big Mac has 21.1g of total carbs and 19.7g of net carbs per 100 grams.
- How many net carbs are in mcdonald's big mac?
- McDonald's Big Mac has 19.7g of net carbs per 100 grams (total carbs 21.1g minus 1.4g fiber).
- Is mcdonald's big mac keto-friendly?
- McDonald's Big Mac has 19.7g net carbs per 100g, which is high for keto. Enjoy it in small portions or save it for higher-carb days.
- How many calories are in mcdonald's big mac?
- McDonald's Big Mac has 258 calories per 100 grams.
- How many carbs are in 1 burger of mcdonald's big mac?
- 1 burger of mcdonald's big mac (213g) has about 42g net carbs, 44.9g total carbs, and 550 calories.
