How Much Caffeine Is Really in Your Drink?

You’ve probably wondered how much caffeine is really in your daily cup—but official numbers can feel vague or hard to compare. Whether you're choosing between coffee types or comparing coffee to tea and soda, knowing the actual caffeine content helps you make informed choices without guessing.

Per 150cc (about 5 oz) drink, Arabica coffee contains 50–110mg caffeine, Robusta 120–260mg, blended coffee 70–160mg, instant coffee 45–110mg, decaf just 1–10mg, tea 40–70mg, and cola 35mg. These ranges reflect common preparation and bean types, giving you a clear, fact-based guide.

What Determines Caffeine Levels in Drinks?

Caffeine content varies mainly due to bean variety, drink type, and preparation method. Arabica and Robusta are the two main coffee species, with Robusta naturally containing roughly twice the caffeine of Arabica. Meanwhile, decaf coffee goes through a process to remove most—but not all—of the caffeine. Non-coffee drinks like tea and cola have their own typical caffeine ranges based on standard brewing or formulation.

Caffeine Content by Drink Type (Per 150cc)

Below are the measured caffeine amounts for each common drink, based on a standard 150cc serving size:

• Arabica Coffee: 50–110mg
• Robusta Coffee: 120–260mg
• Blended (Mixed) Coffee: 70–160mg
• Instant Coffee: 45–110mg
• Decaf Coffee: 1–10mg
• Tea: 40–70mg
• Cola: 35mg

These values come directly from standardized measurements for a 150cc portion, reflecting typical preparation and bean types used in each category.

Why the Wide Ranges?

The caffeine ranges—especially for coffee—depend on multiple factors. For Arabica and Robusta, the species itself dictates baseline caffeine levels, with Robusta being much stronger. Blended coffees combine beans with varying profiles, while instant coffee is affected by both bean type and the dehydration process. Decaf coffee is decaffeinated but not caffeine-free. Tea varies based on leaf type and steeping time, and cola is formulated consistently but at a lower caffeine level than most coffees.

Frequently Asked Questions

What coffee has the highest caffeine content per 150cc?

Robusta coffee contains the most caffeine per 150cc, with levels between 120–260mg. This is significantly higher than Arabica coffee’s 50–110mg range, due to Robusta’s naturally higher caffeine concentration in the bean.

Is decaf coffee really caffeine-free?

No, decaf coffee is not caffeine-free. It contains 1–10mg of caffeine per 150cc cup, which is a very small amount compared to regular coffee but not zero.

Does tea or cola have more caffeine than instant coffee?

It depends. Tea has 40–70mg per 150cc, cola has 35mg, and instant coffee ranges from 45–110mg. So some teas may have less caffeine than instant coffee, but certain blends or stronger brews of tea could overlap or exceed cola.

How does blended coffee compare to single-origin coffee?

Blended (mixed) coffee typically contains 70–160mg caffeine per 150cc, a broader range than many single-origin options. The blend’s caffeine depends on the beans used, whereas single-origin coffees (like pure Arabica or Robusta) offer more predictable ranges.

Why does caffeine content vary so much even within the same drink type?

Caffeine varies due to factors like bean species (Arabica vs Robusta), roast level, preparation method, and serving size. Even within coffee types, different beans, brewing strengths, and ratios lead to the ranges shown.

Recommended FrontStreet Coffees for Caffeine Lovers

For those seeking a strong caffeine kick, try FrontStreet Coffee’s Ethiopia Humbera (known for bright citrus and floral tones with medium-high caffeine from Ethiopian Yirgacheffe genetics), PWN Golden Mandheling (a classic Indonesian full-bodied bean with earthy richness and moderate-high caffeine), and Brazil Queen Manor (a smooth, nutty washed Brazilian offering with steady caffeine and low acidity). All deliver distinct flavour and reliable caffeine levels. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.