Calories in Black Tea: Complete Nutrition Facts & Breakdown

Last verified: April 2026

Executive Summary

Black tea is one of the most calorically negligible beverages you can drink: a 100g serving contains just 1 calorie with virtually zero macronutrients. This means a typical 8-ounce cup of brewed black tea—which is roughly 240ml or about 240g of liquid—delivers less than 1 calorie, making it an ideal choice for anyone tracking caloric intake. The surprise here isn’t just the minimal calorie count; it’s that this ancient beverage still delivers measurable micronutrients like magnesium (3mg), potassium (37mg), and folate (5mcg) that contribute to overall wellness.

Unlike many other common drinks, black tea contains no protein, negligible carbohydrates (0.3g per 100g), no fat, and no fiber. When you brew a cup at home, you’re essentially drinking water infused with beneficial compounds—polyphenols, catechins, and caffeine—without any meaningful caloric penalty. This makes black tea exceptional for those following low-calorie diets, intermittent fasting, or simply looking to stay hydrated without liquid calories.

Main Data Table

Nutrient	Amount (per 100g)	Daily Value %
Calories	1 kcal	0.05%
Protein	0 g	0%
Carbohydrates	0.3 g	0.1%
Fat	0 g	0%
Fiber	0 g	0%
Iron	0.02 mg	0.1%
Magnesium	3 mg	0.7%
Potassium	37 mg	0.8%
Folate	5 mcg	1.3%
Calcium	0 mg	0%

Breakdown by Experience/Category

Black tea nutrition doesn’t vary dramatically based on brewing method or steep time—the caloric content remains virtually constant at 1 calorie per 100g whether you’re using loose leaf, tea bags, or instant preparations. However, the bioavailability and concentration of beneficial compounds change significantly:

• Lightly Brewed (2-3 minutes): Extracts basic flavor and some caffeine; micronutrients minimal but still present
• Standard Brew (4-5 minutes): Optimal extraction for flavor and antioxidant compounds; delivers full micronutrient profile
• Long Steep (6+ minutes): Extracts maximum polyphenols and tannins; same 1 calorie, enhanced beneficial compounds
• Cold Brew (8-12 hours): Gentler extraction creates smoother taste; slightly lower tannin content but retains all minerals (37mg potassium, 3mg magnesium)

Comparison Section

When comparing black tea to other popular beverages, the caloric difference becomes striking. Let’s examine how it stacks up against similar drinks:

Beverage (100g)	Calories	Carbs (g)	Protein (g)
Black Tea	1	0.3	0
Green Tea	1	0.2	0
Coffee (Brewed)	2	0.3	0.3
Milk (2%)	49	4.8	3.3
Orange Juice	45	10.4	0.7
Soft Drink (Typical)	42	10.6	0

Black tea ties with green tea as the lowest-calorie brewed beverage option. A typical 8-ounce cup contains approximately 0.24 calories—essentially zero. By comparison, 2% milk contains 117 calories per cup, and a standard soft drink contains roughly 100 calories per cup. Even coffee at 2 calories per 100g doubles black tea’s caloric content, though both remain negligible for practical purposes.

Key Factors

1. Brewing Temperature Affects Micronutrient Extraction

Water temperature directly influences how much magnesium (3mg per 100g), potassium (37mg), and folate (5mcg) leach into your cup. Boiling water (212°F) extracts minerals most efficiently, though it can increase tannin bitterness. The 0.02mg of iron present requires proper extraction to become bioavailable—steep for 4-5 minutes at 195-205°F for optimal results without sacrificing taste.

2. Zero Impact on Caloric Budgets

At 1 calorie per 100g, black tea has zero meaningful impact on daily caloric intake. Even if you drink 2 liters (2000g) daily—an extreme amount—you’re consuming only 20 calories. This makes it perfect for intermittent fasting protocols where people want flavorful beverages without breaking a fast. The carbohydrate content of 0.3g per 100g is equally negligible.

3. Natural Caffeine Content Without Calories

Black tea’s appeal lies partially in its caffeine content—typically 40-70mg per 8-ounce cup—delivered with zero caloric penalty. This distinguishes it from energy drinks (140+ calories) and sweetened coffee beverages (200-400 calories). You get metabolic stimulation and improved focus without liquid calories.

4. Modest But Present Micronutrient Profile

While no single micronutrient reaches significant daily value percentages, the cumulative benefit matters. Potassium (37mg per 100g) supports cardiovascular function, magnesium (3mg) aids muscle relaxation, and folate (5mcg) participates in cell division. These aren’t game-changing amounts, but they contribute to overall nutritional status in a zero-calorie package.

5. Additives Dramatically Change Caloric Profile

Black tea’s nutrition data reflects plain, brewed tea. Adding milk, honey, sugar, or sweeteners transforms the beverage entirely. One tablespoon of honey adds 64 calories and 17g carbs. Two percent milk (2 ounces) adds roughly 15 calories and 1.2g protein. A standard sweetened black tea drink contains 100+ calories versus the base ingredient’s 1 calorie per 100g—a 100-fold increase.

Historical Trends

Black tea’s nutritional profile has remained consistent throughout recorded history because tea leaves themselves haven’t fundamentally changed. However, how we understand and measure black tea nutrition has evolved significantly. In the 1990s, nutritional databases were sparse, and many entries estimated tea as “negligible calories.” Modern USDA testing (current as of April 2026) provides precise measurements: exactly 1 calorie per 100g, 0.3g carbs, and specific micronutrient quantities.

The growing awareness of black tea’s health benefits—particularly its polyphenol and catechin content—has driven increased consumption globally. Market data shows black tea consumption has grown 3-4% annually over the past decade, partly driven by the realization that it’s an ultra-low-calorie, high-benefit beverage compared to trendy alternatives like flavored drinks and premium coffee beverages.

Expert Tips

Tip 1: Brew Longer for Maximum Mineral Extraction

Don’t assume a quick 2-minute steep extracts all the good stuff. Steep black tea for 4-5 minutes to maximize potassium (37mg per 100g) and magnesium (3mg) extraction without significantly increasing tannins. Cold brewing overnight achieves even higher mineral extraction with a smoother taste profile.

Tip 2: Drink Plain Tea if Tracking Calories Matters

Black tea’s primary nutritional advantage—1 calorie per 100g—evaporates when you add sweeteners or milk. If you’re managing weight or following specific caloric targets, drink it plain or with lemon. Lemon juice adds negligible calories (3 per tablespoon) while enhancing iron bioavailability.

Tip 3: Use It as Your Primary Hydration Beverage

With zero macronutrient impact and mild micronutrient benefits, black tea is an ideal replacement for sugary drinks. Switching from a 12-ounce can of cola (140 calories) to black tea daily saves 51,100 calories annually—equivalent to 14.6 pounds of body fat.

Tip 4: Pair with Meals for Iron Absorption

Although black tea contains only 0.02mg iron per 100g, the polyphenols (not captured in standard nutrition data) enhance iron absorption from iron-rich foods when consumed together. Drink black tea with red meat, beans, or spinach to maximize the symergetic effect.

Tip 5: Experiment with Brewing Parameters

Different black tea varieties (Assam, Ceylon, Darjeeling) and brewing temperatures/times yield different flavor profiles. Since calories remain constant at 1 per 100g regardless of brewing method, optimize for taste and polyphenol extraction rather than nutrition—they’re always identical.

FAQ Section

Q1: How many calories are in a cup of black tea?

A standard 8-ounce (240ml) cup of black tea contains approximately 0.24 calories. A larger 12-ounce cup contains about 0.36 calories. For practical purposes, both round to zero calories. The USDA data confirms 1 calorie per 100g, making black tea one of the most calorically insignificant beverages available. Even drinking multiple cups daily adds negligible calories to your total intake.

Q2: Does black tea have carbohydrates?

Yes, but minimally. Black tea contains 0.3g carbohydrates per 100g. In an 8-ounce cup (240g), that’s approximately 0.72g of carbs. For ketogenic dieters or those tracking macros strictly, this is effectively zero carbs—below the 1g threshold most consider significant. The carbohydrates present come from natural tea solids, not added sugars.

Q3: Why does black tea have potassium and magnesium?

Tea leaves naturally accumulate minerals from the soil where they grow. Potassium (37mg per 100g) and magnesium (3mg per 100g) are drawn up through the plant’s roots and concentrated in the leaves. When you brew tea, hot water extracts these water-soluble minerals from the leaves into your cup. The longer you steep, the higher the mineral concentration becomes—though these amounts remain modest compared to foods like bananas or spinach.

Q4: Is black tea better than coffee for calorie counting?

Black tea and coffee are nearly identical nutritionally: black tea has 1 calorie per 100g while brewed coffee has approximately 2 calories per 100g. Both are effectively zero-calorie beverages for practical purposes. Coffee contains slightly more mineral content and more caffeine, while black tea has higher polyphenol concentrations. Choose based on taste preference rather than caloric difference—either is excellent for calorie-conscious drinkers.

Q5: Does adding milk to black tea significantly increase calories?

Yes, dramatically. While black tea alone contains 1 calorie per 100g, adding milk transforms it entirely. Two ounces of 2% milk (a typical pour) adds approximately 15 calories and 1.2g protein. A 4-ounce “London Fog” style preparation with milk adds 30+ calories. If you’re maximizing the zero-calorie benefit of black tea, drink it plain or with lemon (3 calories per tablespoon). Even a splash of milk multiplies the caloric content by 15-30 times.

Conclusion

Black tea’s caloric profile—just 1 calorie per 100g—makes it an exceptional choice for anyone prioritizing minimal caloric intake without sacrificing flavor or beverage variety. With zero protein, zero fat, and negligible carbohydrates (0.3g per 100g), it fits seamlessly into calorie-restricted diets, intermittent fasting protocols, and ketogenic approaches. The modest micronutrient content—37mg potassium, 3mg magnesium, and 5mcg folate—adds nutritional depth without meaningful macronutrient impact.

The key takeaway: drink black tea plain or with minimal additions (lemon, lime) to preserve its caloric advantage. Adding sweeteners, milk, or syrups instantly negates this benefit by adding 15-100+ calories per serving. For maximum benefit, brew for 4-5 minutes at proper temperature to extract the full micronutrient profile and beneficial polyphenols. Whether you’re optimizing for weight management, intermittent fasting, or simply seeking a flavorful zero-calorie alternative to sugary beverages, black tea delivers consistently—every cup, every time, with the same nutrition data verified across multiple sources as of April 2026.

Related tool: Try our free calculator