Calories in McDonald's fries
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 McDonald's fries contains 323 kcal, with 3.4 g of protein, 42.6 g of carbohydrate and 15.5 g of fat.
A typical serving — 1 serving, about 117 g — is roughly 378 kcal.
That is a fairly calorie-dense food, so portion size matters.
Nutrition facts
| Nutrient | Per 100 g | 1 serving (117 g) |
|---|---|---|
| Calories | 323 kcal | 378 kcal |
| Protein | 3.4 g | 4 g |
| Carbohydrates | 42.6 g | 49.8 g |
| Sugars | 0.2 g | 0.2 g |
| Fibre | 3.9 g | 4.6 g |
| Fat | 15.5 g | 18.1 g |
| Saturated fat | 2.3 g | 2.7 g |
| Sodium | 189 mg | 221 mg |
| Potassium | 596 mg | 697 mg |
| Calcium | 19 mg | 22 mg |
| Iron | 0.8 mg | 0.9 mg |
| Vitamin C | 5.6 mg | 6.6 mg |
| Water | 37 g | 43 g |
Calories per serving
| Serving | Weight | Calories | Protein | Carbohydrates | Fat |
|---|---|---|---|---|---|
| 1 serving | 117 g | 378 | 4 g | 49.8 g | 18.1 g |
| 1 large serving | 150 g | 485 | 5.1 g | 63.9 g | 23.2 g |
Photograph it instead of looking it up
Wellix identifies McDonald's 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 | 81 | 0.9 g | 10.6 g | 3.9 g |
| 50 g | 162 | 1.7 g | 21.3 g | 7.7 g |
| 100 g | 323 | 3.4 g | 42.6 g | 15.5 g |
| 150 g | 485 | 5.1 g | 63.9 g | 23.2 g |
| 200 g | 646 | 6.8 g | 85.2 g | 30.9 g |
| 250 g | 808 | 8.5 g | 106.5 g | 38.7 g |
| 300 g | 969 | 10.2 g | 127.7 g | 46.4 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 McDonald's fries the split is:
- Protein: 3.4 g × 4 = 14 kcal — 4% of calories
- Carbohydrates: 42.6 g × 4 = 170 kcal — 53% of calories
- Fat: 15.5 g × 9 = 139 kcal — 43% of calories
- Most of the energy in McDonald's fries comes from carbohydrate (53% of calories).
- It provides 3.9 g of fibre per 100 g, which is a good amount.
- For 200 kcal you can eat about 60 g.
What actually changes the number
McDonald's fries are 323 kcal per 100 g — a medium is about 380 kcal and a large 480. They are among the more precisely documented foods you can eat, so use the size, not a guess.
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 McDonald's 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 McDonald's fries?
100 g of McDonald's fries contains 323 kcal (3.4 g protein, 42.6 g carbohydrate, 15.5 g fat), according to USDA reference data.
How many calories are in a serving of McDonald's fries?
A typical serving of McDonald's fries — 1 serving, about 117 g — has roughly 378 kcal. Weigh your own portion once to see how it compares; serving sizes vary more than the food does.
How much protein is in McDonald's fries?
McDonald's fries: 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 McDonald's fries equals 200 kcal?
At 323 kcal per 100 g, about 60 g of McDonald's fries equals 200 kcal.
Can I track McDonald's fries by taking a photo?
Yes. A photo calorie app like Wellix identifies McDonald's 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 170721: "McDONALD'S, french fries". 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 McDonald's fries on your plate, estimates the portion and logs calories, protein, carbs and fat in seconds. Free to start on iPhone and Android.
