Carbs in Croissant: The Quick Answer
Croissant contains 43.2g of net carbs per 100g, calculated by subtracting 2.6g of dietary fiber from 45.8g of total carbohydrates. With 406.0 calories, 8.2g protein, and 21.0g fat per 100g, it is classified as High Carbs for carbohydrate content.
Net carbs — not total carbs — are what matter for keto and low-carb diets. Only net carbs raise blood sugar and affect insulin, which is why tracking them accurately is key to staying in ketosis. Use our Keto Macro Calculator to find your daily net carb limit based on your body and goals.
Is Croissant Keto Friendly?
Croissant is high in carbs with 43.2g net carbs per 100g. It is generally not suitable for strict keto (under 20g net carbs/day) but may fit into a broader low-carb diet depending on portion size and your daily limit.
Best Low-Carb Swaps for Croissant
Croissant is high in carbs. If you're eating low-carb or keto, these swaps deliver the same satisfaction with a fraction of the net carbs.
| Instead of | Try this | Why it helps |
|---|---|---|
| A croissant (~26g net carbs) | Almond flour croissant | Flaky layers, buttery taste, ~5g net carbs |
| Croissant sandwich | Large lettuce leaf folded around fillings | Crisp and fresh — deli meat and cheese taste great this way |
| Croissant with jam at breakfast | Greek yogurt with berries and a drizzle of sugar-free syrup | Creamy, sweet, protein-rich, ~5g net carbs |
How Net Carbs Are Calculated
Net carbs are calculated by subtracting dietary fiber (and sugar alcohols, if present) from total carbohydrates: Net Carbs = Total Carbs − Fiber. For Croissant: 45.8g − 2.6g = 43.2g net carbs per 100g.
Dietary fiber is subtracted because it passes through the digestive system without being absorbed as glucose. It does not raise blood sugar or trigger an insulin response, making it irrelevant for carb counting on keto and low-carb diets.