Is Big Mac keto?
Big Mac is not keto: it has ~42 g of net carbs per 1 burger, against the keto diet's 5 g-per-serving limit.
Net carbs = total − fiber
42 g
per 1 burger
These are the carbs that count on keto: total carbs minus fiber.
A Big Mac contains 42 net carbs per serving, which is too high for a ketogenic diet.
Nutrition facts for big mac
How many carbs are in big mac?
Big Mac has ~45 g of carbs and ~42 g of net carbs per 1 burger (total carbs minus 3 g of fiber).
Why big mac is not keto?
On keto the goal is to stay under ~5 g of net carbs per serving; big mac has 42 g per 1 burger (45 g total − 3 g of fiber).
How much big mac can I eat on keto?
To stay under 5 g of net carbs, the limit is ~26 g of big mac.
Related
No
No
Yes
In moderation
No
No
See all: Keto fast food
Reviewed by the Ketorai team · Last updated: July 6, 2026 · How we assign the verdict
For information only. This does not replace advice from a health professional.
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