Last reviewed May 2026. This article is for general information only and does not replace medical or nutrition advice. If you have a diagnosed condition affected by caffeine or coffee compounds, talk to your healthcare provider.
You sip a cup of black coffee. Two calories, give or take. You add a splash of milk and a teaspoon of sugar, and the cup contains 25 calories. You order a grande Starbucks white chocolate mocha with whipped cream, and the cup contains 470 calories, more saturated fat than a McDonald’s quarter pounder. The nutrition of your coffee is almost entirely about what you add to it, with the small but meaningful exception of caffeine itself.
Basic nutrition of black coffee
Per 8 oz (240 ml) brewed black coffee, no additions:
- Calories: 2-5 kcal
- Caffeine: 80-100 mg (varies by bean, brewing method, strength)
- Fat: 0 g
- Carbohydrates: 0 g
- Protein: 0.3 g
- Potassium: ~120 mg (about 3% daily value)
- Magnesium: ~7 mg (about 2% daily value)
- Niacin (vitamin B3): ~0.5 mg (about 3% daily value)
- Riboflavin (vitamin B2): ~0.2 mg (about 11% daily value)
For practical purposes, black coffee is essentially a zero-calorie, zero-fat, zero-carb beverage with trace nutrients and a meaningful dose of caffeine. The nutrition profile changes when you add things.
What additions do to the nutrition profile
- 1 tsp sugar: +16 calories, 4 g carbs
- 1 tbsp whole milk: +9 calories, 0.5 g fat, 0.7 g carbs, 0.5 g protein
- 1 tbsp half-and-half: +20 calories, 1.7 g fat, 0.7 g carbs, 0.4 g protein
- 1 tbsp heavy cream: +52 calories, 5.5 g fat, 0.4 g carbs, 0.3 g protein
- 1 tbsp non-dairy creamer (powder): +30 calories, 2 g fat, 3 g carbs
- 1 pump (about 1 tbsp) flavored syrup (Starbucks): +20 calories, 5 g sugar
- 1 oz whipped cream: +50 calories, 5 g fat
The math adds up faster than people realize. A grande Starbucks vanilla latte with 2% milk has 250 calories, 6 g fat, 35 g carbs (32 g sugar). A grande caramel macchiato has 250 calories with 7 g fat. A grande white chocolate mocha with whipped cream is 470 calories and 18 g fat – more saturated fat than a McDonald’s quarter pounder.
For practical strategies on cutting calories without abandoning the experience, see our piece on how to cut fat and calories in your coffee.
Caffeine – the most important compound
Caffeine is what most coffee research focuses on, and it’s the compound that drives most of coffee’s noticeable effects. Typical amounts:
- Brewed coffee (8 oz): 80-100 mg
- Espresso (1 oz shot): 60-75 mg
- Cold brew (8 oz, before dilution): 150-200 mg
- Instant coffee (8 oz): 60-80 mg
- Decaf coffee (8 oz): 2-15 mg (decaf is “97% caffeine-free,” not 100%)
The FDA considers up to 400 mg of caffeine per day generally safe for healthy adults – about four 8 oz cups of brewed coffee. For pregnant women, the ACOG-recommended limit is 200 mg/day. See our how much caffeine is safe guide for full details.
Antioxidants and bioactive compounds
Coffee is the largest source of dietary antioxidants for most Americans, not because coffee is especially antioxidant-rich per cup but because Americans drink a lot of it. The primary antioxidant compounds in coffee:
- Chlorogenic acids: the major polyphenol class in coffee. About 7-9% of green coffee by weight before roasting (roasting reduces this). Associated with improved glucose metabolism, lower inflammation markers, and protective effects in animal studies.
- Cafestol and kahweol: diterpene compounds in coffee oils. Show liver-protective effects in some studies. Also raise LDL cholesterol – these are the compounds paper filters remove and French press/espresso leave in. See the pros and cons of drinking coffee piece for the cholesterol discussion.
- Trigonelline: a nicotinic acid precursor with potential anti-inflammatory and antimicrobial effects.
- N-methylpyridinium: formed during roasting, may have anti-cancer properties in laboratory studies.
The cumulative effect of these compounds is the reason coffee shows up as protective in epidemiological studies for type 2 diabetes, liver disease, certain cancers, and all-cause mortality at moderate consumption levels.
Vitamins and minerals (modest amounts)
Coffee contains small amounts of several B vitamins and minerals:
- Riboflavin (B2): ~11% DV per 8 oz cup
- Pantothenic acid (B5): ~6% DV
- Niacin (B3): ~3% DV
- Manganese: ~3% DV
- Potassium: ~3% DV
- Magnesium: ~2% DV
For someone drinking 2-4 cups daily, these add up to a meaningful contribution toward daily B-vitamin and mineral intake. Coffee is not a primary source of these nutrients but is a contributing source.
What’s NOT in coffee
- No vitamin C. Even though coffee is bright/acidic in taste, the acidity isn’t from vitamin C.
- No iron worth counting, though coffee actually interferes with iron absorption from other foods (reduces non-heme iron absorption by 35-90% when consumed with meals).
- No protein. Coffee contains amino acids but in trace amounts. The protein in your latte is from the milk, not the coffee.
- No fiber, though it does have a mild laxative effect for many people (mechanism involves caffeine stimulating gastric motility, not fiber).
Practical translation
If you’re tracking calories or macros, black coffee is essentially free. The “calories” you’re paying for in coffee are entirely from what you add to it: milk, cream, sugar, syrups, whipped cream.
If you’re managing iron deficiency or supplementing iron, drink coffee at least 1 hour away from iron-containing meals or supplements to avoid the absorption interference.
If you’re trying to maximize the antioxidant benefits, lighter roasts have slightly higher chlorogenic acid content (some is destroyed by darker roasting). Brewing with a paper filter removes the cholesterol-raising diterpenes (cafestol, kahweol) – useful if you have elevated LDL.
If you’re pregnant or planning pregnancy, the relevant nutrition variable is caffeine, not other coffee components. Keep total daily caffeine under 200 mg.
When to see a doctor
- Iron deficiency anemia (talk to your doctor about timing coffee away from iron-containing foods and supplements)
- Elevated LDL cholesterol with regular French press, espresso, or unfiltered coffee consumption
- Pregnancy with caffeine intake over 200 mg per day
- Diagnosed cardiovascular, sleep, or anxiety condition affected by caffeine
- Persistent heartburn or reflux with coffee consumption
Frequently asked questions
How many calories are in black coffee?
About 2-5 calories per 8 oz cup. For practical purposes, black coffee is a zero-calorie beverage. All the calories in a coffee drink come from what you add: milk, cream, sugar, syrups, whipped cream.
Does coffee count as water for hydration?
Yes. Despite the persistent myth that coffee is dehydrating, controlled studies show that moderate coffee consumption contributes to daily fluid intake similarly to water. The diuretic effect of caffeine is meaningful only at very high single doses or in non-regular coffee drinkers.
What are the antioxidants in coffee?
The main antioxidant compounds are chlorogenic acids, cafestol, kahweol, trigonelline, and N-methylpyridinium. Coffee is the largest source of dietary antioxidants for most Americans simply because of volume consumed.
Does coffee block iron absorption?
Yes, significantly. Coffee reduces non-heme iron absorption by 35-90% when consumed with meals. For people managing iron deficiency, drink coffee at least 1 hour away from iron-containing meals or iron supplements.
Is decaf coffee nutritionally the same?
Largely yes. Decaf coffee retains most of the antioxidants, vitamins, and minerals of regular coffee. It loses about 97% of the caffeine. If you’re drinking coffee for the polyphenols and antioxidants rather than the caffeine, decaf is essentially equivalent.
Sources
- USDA FoodData Central – Coffee, brewed, prepared with tap water
- FDA – Spilling the Beans: How Much Caffeine is Too Much?
This article is for general information only and does not replace personalized medical or nutritional advice. If you have any condition affected by coffee or caffeine, consult your healthcare provider.
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