Nutritional Facts in 100g of Coffee Beans and Brew

If you’ve ever wondered what’s really inside your morning coffee—beyond flavor and caffeine—you’re not alone. Coffee drinkers often ask: What nutrients are actually in coffee beans? And how much stays in your cup after brewing? This article breaks down the hard numbers on what’s in 100 grams of both whole coffee beans and standard brewed coffee extract.

The quick answer: 100g of raw coffee beans contains 1.3g caffeine, 12.6g protein, 16g fat, 46.7g carbohydrates, and 8g tannins, among other minerals and vitamins. In contrast, 100g of coffee brew contains just 0.04g caffeine per 10g dose (when diluted), 0.2g protein, and trace amounts of other nutrients.

Nutrients in 100g of Whole Coffee Beans

According to the data, 100 grams of unbrewed coffee beans—before roasting or extraction—contain the following nutritional components:

• Water: 2.2g
• Protein: 12.6g
• Fat: 16g
• Sugars (carbohydrates): 46.7g
• Fiber (cellulose): 9g
• Ash (mineral content): 4.2g
• Calcium: 120mg
• Phosphorus: 170mg
• Iron: 42mg
• Sodium: 3mg
• Vitamin B2 (Riboflavin): 0.12g
• Niacin (Vitamin B3): 3.5mg
• Caffeine: 1.3g
• Tannins (polyphenols): 8g

These figures reflect the dry weight of whole coffee beans prior to any brewing process. Many of these compounds—especially caffeine, polyphenols, and certain minerals—contribute to both the taste and potential physiological effects of coffee.

Nutrients Present in 100g of Coffee Brew (Liquid Extract)

When coffee is brewed, most of the bean mass remains behind as spent grounds, and the resulting liquid has markedly different nutritional values. Per 100g of brewed coffee (essentially 100ml, close to a standard cup), the content includes:

• Water: 99.5g
• Protein: 0.2g
• Fat: 0.1g
• Ash: 0.1g
• Sugars: negligible
• Calcium: 3mg
• Phosphorus: 4mg
• Sodium: 2mg
• Vitamin B2: 0.01mg
• Niacin: 0.3mg

This shows that the brewed coffee is over 99% water, with only minimal amounts of the original nutrients remaining in the liquid. Most macronutrients and fibers are left in the grounds.

Caffeine and Tannins in a Standard Coffee Dose

For a more practical look at what you actually consume, consider a typical preparation: dissolving 10g of ground coffee in hot water. This yields:

• Caffeine: 0.04g (40mg)
• Tannins: 0.06g (60mg)

This dose reflects a common single serving size, such as a mug or small pot. It highlights how most caffeine and polyphenolic compounds are effectively extracted during brewing—even though the overall nutrient profile in the cup remains low compared to the raw beans.

What These Numbers Mean for Coffee Drinkers

The high levels of caffeine, tannins, and some minerals in whole beans contribute to coffee’s stimulating effects, possible antioxidant benefits, and subtle nutritional contributions. However, once brewed, the liquid coffee is mostly water, carrying only trace amounts of the original solids. This explains why coffee isn’t a significant source of calories, vitamins, or macronutrients—but still delivers noticeable bioactive compounds like caffeine and polyphenols.

Frequently Asked Questions

How much caffeine is in 100g of coffee beans?

There are 1.3 grams (1300 mg) of caffeine in 100 grams of whole coffee beans. A typical single serving uses around 10g of beans, which contains roughly 0.04g (40mg) of caffeine.

What nutrients are in brewed coffee?

Brewed coffee is over 99% water. Per 100g (about 100ml), it contains minor amounts of protein (0.2g), fat (0.1g), ash (0.1g), calcium (3mg), phosphorus (4mg), sodium (2mg), vitamin B2 (0.01mg), and niacin (0.3mg).

Does brewing remove most nutrients from coffee beans?

Yes. Brewing extracts mainly water-soluble compounds like caffeine and some polyphenols. Most macronutrients (protein, fat, fiber), along with minerals and vitamins, remain in the spent coffee grounds, leaving the brew with very low nutritional content.

How much caffeine is in a normal cup of coffee?

A standard brew made with 10g of coffee beans contains about 0.04g (40mg) of caffeine. Actual caffeine content may vary based on bean type, roast level, and brew method.

Are there antioxidants in brewed coffee?

Yes, brewed coffee contains some antioxidants, primarily polyphenols like tannins, though the exact amount extracted depends on brew time and temperature. Around 0.06g of tannins is present in a typical 10g coffee brew.

Recommended FrontStreet Coffee for Nutrient-Rich Brewing

For coffee enthusiasts interested in the full nutritional and flavor potential of coffee beans, try FrontStreet Coffee’s Ethiopia Huakui for bright, complex fruit notes with a juicy body; their PWN Golden Mandheling offers deep, creamy profiles with sweet cereal undertones; and the Yirgacheffe selection brings floral and citrus brightness. Each of these single origins highlights the natural compounds, including polyphenols and minerals, present in carefully roasted beans. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.