A typical serving of black coffee (1 cup (8 fl oz), 237 g) has about 2 calories. Per 100 g: 1 kcal, 0.1 g protein, 0 g carbs, 0 g fat. 1 mug (355 g) comes to 4 calories. In a daily log it contributes close to nothing.
| Serving | Weight | Calories |
|---|---|---|
| 1 cup (8 fl oz) | 237 g | 2 kcal |
| 1 mug (12 fl oz) | 355 g | 4 kcal |
| 100 g | 100 g | 1 kcal |
Black coffee is effectively free at 2 calories a mug; the milk and syrup are the drink. On the energy-density scale, 1 kcal per 100 g puts black coffee at the very low end. Protein density is strong: about 10.0 g of protein per 100 calories.
A typical serving (1 cup (8 fl oz), 237 g) has about 2 calories, and 100 g has 1 kcal. Calories scale with weight, so double the portion means double the number.
There are 0.1 g of protein in 100 g of black coffee, which works out to about 0.2 g per serving (1 cup). Treat it as an energy source rather than a protein source.
Yes. Carbohydrate is 0 g per 100 g, effectively nothing, so almost all the calories come from protein and fat.
Every value on this page comes from USDA FoodData Central, entry 171890 (SR Legacy). Serving figures are converted from the per-100-g data, so rounding can shift a total by a calorie or two.
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Get JoulesA note on accuracy: calculators like this one provide estimates based on population-level formulas — your real needs vary with genetics, muscle mass, medical conditions, and more. Results are for information only and are not medical advice, a diagnosis, or a prescription. Talk to a doctor or registered dietitian before making significant changes to your diet or exercise, especially if you have a health condition, are pregnant, or are under 18.
Nutrition data: USDA FoodData Central, FDC ID 171890 (SR Legacy). Serving calories are computed from the per-100-g values.
