
Starbucks Sumatra
Caffeine
130 – 300 mg
Note: Caffeine amounts are based on standard brewed Starbucks Sumatra coffee and can vary slightly by grind size, brewing strength, and store preparation.
| Attribute | Value |
|---|---|
| Caffeine Level | Moderate |
| Serving Size | 12 – 20 fl oz |
| Serving Size (ml) | 355 – 591 ml |
| Caffeine | 130 – 300 mg |
| Calories | 5 kcal |
| Sugar | 0 |
| Caffeine per fl oz | 10 – 12 mg/fl oz |
Starbucks Sumatra is one of the brand’s most distinctive dark roasts, prized for its earthy, herbal notes and full body. Cultivated on the Indonesian island of Sumatra, this coffee is known for its low acidity and bold flavor.
What is Starbucks Coffee?
Starbucks Coffee is a global brand that has transformed coffee culture since its founding in Seattle in 1971. With thousands of stores worldwide, Starbucks offers a wide range of beverages, including brewed coffee, espresso drinks, teas, and seasonal specialties.
- Global Reach – Over 38,000 stores worldwide.
- Variety – Espresso drinks, brewed coffee, teas, and cold beverages.
- Consistency – Standardized recipes across locations.
- Innovation – Seasonal drinks and specialty blends.
- Community Impact – Ethical sourcing and sustainability programs.
Starbucks represents more than just coffee; it’s a lifestyle brand. Its Sumatra roast is a staple for customers who prefer strong, earthy flavors.
Flavor Profile and Roast Level of Starbucks Sumatra
Starbucks Sumatra is a dark roast coffee known for its bold, earthy flavor. The beans are roasted until oils rise to the surface, creating a shiny appearance and a deep aroma. This roast emphasizes body and richness rather than acidity, making it distinct from lighter roasts.
- Roast Level – Dark roast, nearly black beans.
- Flavor Notes – Earthy, herbal, with hints of cocoa.
- Body – Full‑bodied and heavy.
- Acidity – Very low compared to lighter roasts.
- Aroma – Strong, spicy, and robust.
Sumatra appeals to those who enjoy a powerful coffee experience. Its low acidity makes it smooth, while the bold flavor satisfies drinkers who want intensity.

Caffeine Content in Starbucks Sumatra: Per Shot
Espresso shots brewed with Sumatra beans deliver concentrated caffeine. A single shot typically contains about 75 mg of caffeine, depending on grind and extraction. Double shots are common in Starbucks beverages, doubling the caffeine intake.
- Single Shot – 75 mg caffeine.
- Double Shot – 150 mg caffeine.
- Triple Shot – 225 mg caffeine.
- Consistency – Standardized across Starbucks stores.
- Customization – Customers can add extra shots for strength.
Espresso shots are the foundation of many Starbucks drinks, from lattes to Americanos. Sumatra espresso provides an earthy, bold base that pairs well with milk or can be enjoyed straight.
Caffeine Content in Starbucks Sumatra: Per Cup
A brewed cup of Sumatra varies in caffeine depending on size. An 8‑ounce cup contains about 85–120 mg of caffeine, while larger sizes increase proportionally.
- Tall (12 oz) – 130–180 mg caffeine.
- Grande (16 oz) – 190–240 mg caffeine.
- Venti (20 oz) – 250–300 mg caffeine.
- Preparation Method – Brew strength can slightly alter caffeine.
- Consistency – Starbucks maintains standardized brewing ratios.
Sumatra brewed coffee is one of the stronger options at Starbucks. Its bold flavor matches its moderate‑high caffeine content, making it ideal for those who want both taste and energy.
Caffeine Content in Starbucks Sumatra: Per mg
Understanding caffeine per milligram helps compare Sumatra to other coffees. On average, Starbucks Sumatra contains about 10–12 mg of caffeine per ounce, depending on brew strength.
- Per Ounce – 10–12 mg caffeine.
- Per 100 ml – 35–40 mg caffeine.
- Comparison – Similar to other Arabica dark roasts.
- Consistency – Starbucks provides reliable caffeine levels.
- Utility – Helps track intake for health and diet purposes.
By breaking caffeine down per milligram, customers can better manage consumption. Sumatra’s strong profile means even small servings deliver noticeable energy.
Bean Quality and Ethical Sourcing Behind Starbucks Sumatra
Starbucks emphasizes ethical sourcing and sustainability in its coffee supply chain. Sumatra beans are sourced through the Coffee and Farmer Equity (C.A.F.E.) Practices, ensuring quality and fairness.
- C.A.F.E. Practices – Standards for ethical sourcing.
- Fair Compensation – Farmers receive fair wages.
- Sustainability – Focus on environmental responsibility.
- Quality Control – Beans selected for consistency.
- Transparency – Starbucks reports progress annually.
Sumatra reflects Starbucks’ commitment to both flavor and ethics. By sourcing responsibly, Starbucks ensures that customers enjoy high‑quality coffee while supporting farming communities.
Brewing Methods: How Starbucks Sumatra Delivers Consistency
Consistency is key to Starbucks’ success. Sumatra is brewed using standardized methods across all stores, ensuring customers experience the same flavor worldwide.
- Drip Brewing – Standard method for brewed coffee.
- Espresso Extraction – Controlled timing and pressure.
- Grind Precision – Uniform grind size for balance.
- Water Quality – Filtered water enhances flavor.
- Training – Baristas follow strict guidelines.
These methods guarantee that Sumatra delivers its signature earthy flavor every time. Whether ordered in New York or Jakarta, customers can expect the same bold experience.