Calories in french fries (fast food)
Calories, protein, carbohydrate and fat per 100 g and per serving, from the USDA reference database — plus what actually changes the number on your plate.
Short answer
100 g of french fries (fast food) contains 312 kcal, with 3.4 g of protein, 41.4 g of carbohydrate and 14.7 g of fat.
A typical serving — 1 serving, about 115 g — is roughly 359 kcal.
That is a fairly calorie-dense food, so portion size matters.
Nutrition facts
| Nutrient | Per 100 g | 1 serving (115 g) |
|---|---|---|
| Calories | 312 kcal | 359 kcal |
| Protein | 3.4 g | 3.9 g |
| Carbohydrates | 41.4 g | 47.7 g |
| Sugars | 0.3 g | 0.3 g |
| Fibre | 3.8 g | 4.4 g |
| Fat | 14.7 g | 16.9 g |
| Saturated fat | 2.3 g | 2.7 g |
| Cholesterol | 0 mg | 0 mg |
| Sodium | 210 mg | 242 mg |
| Potassium | 579 mg | 666 mg |
| Calcium | 18 mg | 21 mg |
| Iron | 0.8 mg | 0.9 mg |
| Vitamin C | 4.7 mg | 5.4 mg |
| Water | 39 g | 44 g |
Calories per serving
| Serving | Weight | Calories | Protein | Carbohydrates | Fat |
|---|---|---|---|---|---|
| 1 serving | 115 g | 359 | 3.9 g | 47.7 g | 16.9 g |
| 1 large serving | 150 g | 468 | 5.1 g | 62.2 g | 22.1 g |
Photograph it instead of looking it up
Wellix identifies french fries on your plate, estimates the portion and logs calories, protein, carbs and fat in seconds. Free to start on iPhone and Android.
Calories by weight
Use this table when you know the weight but not the serving:
| Amount | Calories | Protein | Carbohydrates | Fat |
|---|---|---|---|---|
| 25 g | 78 | 0.9 g | 10.4 g | 3.7 g |
| 50 g | 156 | 1.7 g | 20.7 g | 7.4 g |
| 100 g | 312 | 3.4 g | 41.4 g | 14.7 g |
| 150 g | 468 | 5.1 g | 62.2 g | 22.1 g |
| 200 g | 624 | 6.9 g | 82.9 g | 29.5 g |
| 250 g | 780 | 8.6 g | 103.6 g | 36.8 g |
| 300 g | 936 | 10.3 g | 124.3 g | 44.2 g |
Where the calories come from
Calories come from three macronutrients: protein and carbohydrate at 4 kcal per gram, fat at 9 kcal per gram. For french fries (fast food) the split is:
- Protein: 3.4 g × 4 = 14 kcal — 4% of calories
- Carbohydrates: 41.4 g × 4 = 166 kcal — 53% of calories
- Fat: 14.7 g × 9 = 133 kcal — 42% of calories
- Most of the energy in french fries (fast food) comes from carbohydrate (53% of calories).
- It provides 3.8 g of fibre per 100 g, which is a good amount.
- For 200 kcal you can eat about 65 g.
What actually changes the number
Fast-food fries are 312 kcal per 100 g — a medium portion of 115 g is about 360 kcal, a large of 150 g about 470. Thin fries absorb more oil than thick ones, so shoestring fries are the densest.
How accurate are these numbers?
The values on this page are reference averages from the USDA FoodData Central database (SR Legacy release), measured on samples of french fries as sold and prepared in the United States. Your portion will differ: produce varies by variety and ripeness, meat by cut and trim, and anything cooked by the fat and water it gained or lost.
For most foods the per-100 g figure is reliable to within about 10%. The larger uncertainty is almost always the weight of what is on your plate and the cooking fat you cannot see — the two things worth checking before you worry about the database.
How accurate are AI calorie counting apps? →
Related foods
More in Fast food and prepared meals →
Frequently asked questions
How many calories are in 100 g of french fries?
100 g of french fries (fast food) contains 312 kcal (3.4 g protein, 41.4 g carbohydrate, 14.7 g fat), according to USDA reference data.
How many calories are in a serving of french fries?
A typical serving of french fries — 1 serving, about 115 g — has roughly 359 kcal. Weigh your own portion once to see how it compares; serving sizes vary more than the food does.
How much protein is in french fries?
French fries (fast food): 3.4 g of protein per 100 g, which is low. Foods above about 15–20 g per 100 g, or where protein supplies a third or more of the calories, are usually considered high-protein.
What amount of french fries equals 200 kcal?
At 312 kcal per 100 g, about 65 g of french fries equals 200 kcal.
Can I track french fries by taking a photo?
Yes. A photo calorie app like Wellix identifies french fries on the plate and estimates the portion from the image. The estimate is most accurate when you confirm the weight or the count, and tell the app about anything the camera cannot see — cooking oil, butter, dressings and sauces.
Source
Nutrition data: U.S. Department of Agriculture, FoodData Central — SR Legacy, FDC ID 170698: "Fast foods, potato, french fried in vegetable oil". Values are per 100 g of edible portion. Serving weights are USDA household measures or typical retail sizes; check the label where one exists. View the USDA record.
Wellix provides general nutrition information and is not medical advice. Nutrition values are reference averages and individual foods vary. Consult a qualified healthcare professional before making significant dietary changes.
Photograph it instead of looking it up
Wellix identifies french fries on your plate, estimates the portion and logs calories, protein, carbs and fat in seconds. Free to start on iPhone and Android.
