Carbs in French Fries: The Quick Answer
French Fries contains 16.9g of net carbs per 100g, calculated by subtracting 1.6g of dietary fiber from 18.5g of total carbohydrates. With 198.0 calories, 1.9g protein, and 13.1g fat per 100g, it is classified as Moderate 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 French Fries Keto Friendly?
French Fries has 16.9g net carbs per 100g, which is moderate. It can be included occasionally on keto if portions are controlled and the rest of your day's carbs are kept very low.
Make It Keto: French Fries
You don't have to skip French Fries on a low-carb diet — you just need to know what to order (and what to skip).
| When ordering | Make it keto | Carb savings |
|---|---|---|
| French fries with your burger (~27g net carbs per serving) | Ask for a side salad instead of fries | Saves 25g+ of net carbs — most places swap for free |
| Fries for dipping in ketchup | Celery or cucumber sticks with ranch or mayo | Same dipping ritual, near-zero carbs |
| Large fries as a side | Skip the side, add extra protein to your order | More filling, zero carb add-on |
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 French Fries: 18.5g − 1.6g = 16.9g 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.