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Coffee Nutrition Facts: Is Coffee Good for You?
Brewed black coffee is a very low-calorie beverage with virtually no fat, sugar, carbohydrates, or protein. It provides small amounts of some minerals and B vitamins, most notably riboflavin. The nutritional value of a coffee drink depends almost entirely on what you add to it, such as milk, cream, or sugar, and the portion size consumed as part of your overall diet.
Per 100 g · Beverages, coffee, brewed, prepared with tap water
What stands out in coffee
- Almost no calories. Brewed black coffee contains just 1 calorie per 100 grams. A standard ‘1 cup (8 fl oz)’ serving has 2 calories.
- Zero sugar or fat. This data shows 0 grams of total sugars, 0 grams of saturated fat, and 0 mg of cholesterol in 100 grams of brewed coffee.
- Source of riboflavin (B2). A 100-gram serving provides 0.08 mg of riboflavin, which is 6% of the Daily Value.
- Caffeine content. There are 40 mg of caffeine in 100 grams of brewed coffee. A ‘1 cup (8 fl oz)’ serving contains about 95 mg of caffeine.
What to keep in mind
- The nutrition data shown is for black coffee brewed with tap water. Adding milk, cream, sugar, or syrups will increase the calories, fat, and sugar content of the final beverage.
Coffee nutrition facts per 100 g
| Nutrient | Per 100 g | % DV |
|---|---|---|
| Calories | 1 kcal | – |
| Protein | 0.12 g | 0% |
| Total fat | 0.02 g | 0% |
| Saturated fat | 0 g | 0% |
| Monounsaturated fat | 0.01 g | – |
| Polyunsaturated fat | 0 g | – |
| Cholesterol | 0 mg | 0% |
| Carbohydrate | 0 g | 0% |
| Dietary fiber | 0 g | 0% |
| Total sugars | 0 g | – |
| Water | 99.4 g | – |
| Sodium | 2 mg | 0% |
| Nutrient | Per 100 g | % DV |
|---|---|---|
| Potassium | 49 mg | 1% |
| Calcium | 2 mg | 0% |
| Iron | 0.01 mg | 0% |
| Magnesium | 3 mg | 1% |
| Phosphorus | 3 mg | 0% |
| Zinc | 0.02 mg | 0% |
| Copper | 0 mg | 0% |
| Manganese | 0.02 mg | 1% |
| Selenium | 0 mcg | 0% |
| Vitamin A (RAE) | 0 mcg | 0% |
| Vitamin C | 0 mg | 0% |
| Vitamin D | 0 mcg | 0% |
| Vitamin E | 0.01 mg | 0% |
| Vitamin K | 0.1 mcg | 0% |
| Thiamin (B1) | 0.01 mg | 1% |
| Riboflavin (B2) | 0.08 mg | 6% |
| Niacin (B3) | 0.19 mg | 1% |
| Vitamin B6 | 0 mg | 0% |
| Folate (DFE) | 2 mcg | 0% |
| Vitamin B12 | 0 mcg | 0% |
| Choline | 2.6 mg | 0% |
| Caffeine | 40 mg | – |
% Daily Value uses the FDA Daily Values for adults and children 4 years and older. Highlighted rows are 20% DV or more per 100 g. A dash means no Daily Value is set.
Coffee by portion
The nutritional values listed per 100 grams (about 3.5 fl oz) are very small. In common serving sizes, the amounts remain minimal. A ‘6 fl oz’ serving of brewed coffee contains 2 calories and 0.2 grams of protein. A ‘1 cup (8 fl oz)’ serving, which is 237 grams, also provides 2 calories, along with 0.3 grams of protein and no fat, carbohydrates, or sugar.
| USDA portion | Weight | Calories | Protein | Carbs | Fiber | Fat |
|---|---|---|---|---|---|---|
| 1 fl oz | 30 g | 0 | 0 g | 0 g | 0 g | 0 g |
| 6 fl oz | 178 g | 2 | 0.2 g | 0 g | 0 g | 0 g |
| 1 cup (8 fl oz) | 237 g | 2 | 0.3 g | 0 g | 0 g | 0 g |
How coffee compares with other drinks
Compared to other common beverages, brewed coffee’s calorie count of 1 per 100g is similar to green tea and black tea. It is significantly lower than drinks like coconut water, which has 19 calories, or orange juice, with 45 calories per 100g. Among the seven drinks in its group on this site, coffee ranks second highest for Vitamin K content but is in the middle of the group for minerals like potassium and magnesium, ranking fifth for both. It is not considered a good source or high in any vitamin or mineral.
| Per 100 g | Calories | Protein | Carbs | Fiber | Fat |
|---|---|---|---|---|---|
| Coffee | 1 | 0.12 g | 0 g | 0 g | 0.02 g |
| Green Tea | 1 | 0.22 g | 0 g | 0 g | 0 g |
| Black Tea | 1 | 0 g | 0.3 g | 0 g | 0 g |
| Coconut Water | 19 | 0.72 g | 3.7 g | 1.1 g | 0.2 g |
| Orange Juice | 45 | 0.7 g | 10.4 g | 0.2 g | 0.2 g |
Quick answers
How many calories are in a cup of black coffee?
A ‘1 cup (8 fl oz)’ serving of brewed black coffee contains 2 calories. A ‘6 fl oz’ serving also contains 2 calories.
Does black coffee have any carbs or sugar?
No. According to the USDA data, brewed black coffee prepared with tap water contains 0 grams of carbohydrates and 0 grams of total sugars.
How much potassium is in black coffee?
A 100-gram serving of brewed coffee contains 49 mg of potassium, which is 1% of the Daily Value.
When to talk to a doctor or dietitian
- The USDA entry lists 40 mg of caffeine per 100 g. If you are pregnant, have heart rhythm problems or have been told to limit caffeine, check how much is right for you.
- This page describes nutrient content, not medical advice. If a health condition, medicine or pregnancy affects what you eat, a doctor or registered dietitian can tell you how coffee fits your situation.
Last updated October 21, 2026