Calories in dark chocolate (70–85% cocoa)
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 dark chocolate (70–85% cocoa) contains 598 kcal, with 7.8 g of protein, 45.9 g of carbohydrate and 42.6 g of fat.
A typical serving — 1 square, about 10 g — is roughly 60 kcal.
That is a very calorie-dense food: small amounts carry a lot of energy, and it is easy to under-count.
Nutrition facts
| Nutrient | Per 100 g | 1 square (10 g) |
|---|---|---|
| Calories | 598 kcal | 60 kcal |
| Protein | 7.8 g | 0.8 g |
| Carbohydrates | 45.9 g | 4.6 g |
| Sugars | 24 g | 2.4 g |
| Fibre | 10.9 g | 1.1 g |
| Fat | 42.6 g | 4.3 g |
| Saturated fat | 24.5 g | 2.4 g |
| Cholesterol | 3 mg | 0 mg |
| Sodium | 20 mg | 2 mg |
| Potassium | 715 mg | 72 mg |
| Calcium | 73 mg | 7 mg |
| Iron | 11.9 mg | 1.2 mg |
| Water | 1 g | 0 g |
| Caffeine | 80 mg | 8 mg |
Calories per serving
| Serving | Weight | Calories | Protein | Carbohydrates | Fat |
|---|---|---|---|---|---|
| 1 square | 10 g | 60 | 0.8 g | 4.6 g | 4.3 g |
| 1 bar | 100 g | 598 | 7.8 g | 45.9 g | 42.6 g |
Photograph it instead of looking it up
Wellix identifies dark chocolate 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 | 150 | 1.9 g | 11.5 g | 10.7 g |
| 50 g | 299 | 3.9 g | 23 g | 21.3 g |
| 100 g | 598 | 7.8 g | 45.9 g | 42.6 g |
| 150 g | 897 | 11.7 g | 68.9 g | 63.9 g |
| 200 g | 1,196 | 15.6 g | 91.8 g | 85.3 g |
| 250 g | 1,495 | 19.5 g | 114.8 g | 106.6 g |
| 300 g | 1,794 | 23.4 g | 137.7 g | 127.9 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 dark chocolate (70–85% cocoa) the split is:
- Protein: 7.8 g × 4 = 31 kcal — 5% of calories
- Carbohydrates: 45.9 g × 4 = 184 kcal — 31% of calories
- Fat: 42.6 g × 9 = 384 kcal — 64% of calories
- Most of the energy in dark chocolate (70–85% cocoa) comes from fat (64% of calories).
- It provides 10.9 g of fibre per 100 g, which is a good amount.
- 24 g of its carbohydrate per 100 g is sugar.
- For 200 kcal you can eat about 35 g.
Compare preparations
The same food, prepared differently. Cooking removes water (so calories per 100 g rise), adds fat (so they rise further), or both.
| Preparation | Calories | Protein | Carbohydrates | Fat |
|---|---|---|---|---|
| Dark chocolate (70–85% cocoa)this page | 598 | 7.8 g | 45.9 g | 42.6 g |
| Milk chocolate (milk) | 535 | 7.7 g | 59.4 g | 29.7 g |
What actually changes the number
70–85% dark chocolate is 598 kcal per 100 g — more than milk chocolate, because cocoa butter replaces sugar. Two squares (20 g) is a 120 kcal portion; a whole bar is 600.
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 dark chocolate 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 Sweets, snacks and bakery →
Frequently asked questions
How many calories are in 100 g of dark chocolate?
100 g of dark chocolate (70–85% cocoa) contains 598 kcal (7.8 g protein, 45.9 g carbohydrate, 42.6 g fat), according to USDA reference data.
How many calories are in a serving of dark chocolate?
A typical serving of dark chocolate — 1 square, about 10 g — has roughly 60 kcal. Weigh your own portion once to see how it compares; serving sizes vary more than the food does.
How much protein is in dark chocolate?
Dark chocolate (70–85% cocoa): 7.8 g of protein per 100 g, which is moderate. 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 dark chocolate equals 200 kcal?
At 598 kcal per 100 g, about 35 g of dark chocolate equals 200 kcal.
Can I track dark chocolate by taking a photo?
Yes. A photo calorie app like Wellix identifies dark chocolate 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 170273: "Chocolate, dark, 70-85% cacao solids". 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 dark chocolate on your plate, estimates the portion and logs calories, protein, carbs and fat in seconds. Free to start on iPhone and Android.
