How Much Caffeine Is Really in Your Drink?

You’re standing in the café, scanning the menu. Maybe you want a boost but don’t want to overdo it. Or maybe you’re cutting back and need to know what’s really in that latte. How much caffeine is actually in your drink — and how does it compare to others? The short answer is: it varies a lot. But we’ve gathered the actual numbers so you don’t have to guess.

On average, an 8-ounce (240ml) cup of brewed coffee contains 95mg of caffeine, while the same size of black tea has about 47mg. Espresso shots (1 ounce / 30ml) pack around 63mg each, but most drinks use more than one. Cola sodas typically have 22–30mg per 12-ounce can, and energy drinks can soar past 200mg per serving. Decaf coffee? Still around 2–5mg per 8-ounce cup.

What Exactly Is Caffeine — and Why Does It Vary So Much?

Caffeine is a natural stimulant found in the leaves, seeds, and fruits of over 60 plants, including coffee beans, tea leaves, cacao pods, and kola nuts. In drinks, the amount of caffeine depends on multiple factors: the type of plant, how it’s processed, the brewing or preparation method, and the serving size. That’s why a small espresso can have more caffeine per ounce than a big mug of drip coffee — even though the total in the cup might be lower.

Brewed Coffee vs. Espresso: What’s Stronger?

It’s a common misunderstanding: people often assume espresso is “stronger” in caffeine because it’s more intense. But by volume, brewed coffee usually has more total caffeine. Here’s how the numbers break down for an 8-ounce serving:

• Brewed coffee (drip): 95mg caffeine (range: 70–140mg)
• Espresso (1 shot / ~30ml): 63mg caffeine

Most coffee shop espresso-based drinks — like lattes or cappuccinos — use 1–2 shots. That means a double-shot latte still delivers roughly 126mg of caffeine, but in a much smaller volume than a full mug of brewed coffee.

Tea: How Much Caffeine Is Actually in Your Cup?

Tea drinkers often assume their drink has less caffeine than coffee — and sometimes that’s true. But it depends on the type of tea. Here’s how common types stack up per 8-ounce serving:

• Black tea: 40–70mg caffeine (average: 47mg)
• Green tea: 20–45mg caffeine (average: 30–35mg)
• White tea: 15–30mg caffeine
• Oolong tea: 30–50mg caffeine

Matcha, the powdered green tea, is different. A typical serving (1 gram of matcha powder in 2 ounces of water) contains around 70mg of caffeine — nearly as much as a shot of espresso. Herbal teas such as chamomile or peppermint are usually caffeine-free, as they’re not made from tea leaves at all.

Soft Drinks, Energy Drinks, and Other Sources

Coffee and tea aren’t the only caffeine carriers. Here are some other common sources with typical caffeine contents:

• Cola (12oz can): 22–30mg caffeine
• Diet cola (12oz can): 30–40mg caffeine
• Energy drinks (varies by brand, 8–16oz): 50–300mg caffeine (commonly 80–200mg)
• Yerba mate (8oz brewed): 85mg caffeine (can range higher)
• Instant coffee (8oz): 30–90mg caffeine (average: 60–70mg)
• Decaf coffee (8oz): 2–5mg caffeine

Energy shots (like 1–2oz bottles) can contain 100–200mg caffeine in a single serving. Always check labels: formulations change, and “natural” doesn’t mean low-caffeine.

Is Decaf Really Caffeine-Free?

No. Decaffeinated coffee still contains a small amount of caffeine. On average, an 8-ounce cup of decaf has about 2–5mg of caffeine — significantly less than regular coffee, but not zero. Some decaf processes remove more caffeine than others, but trace amounts remain. If you’re highly sensitive, even decaf might affect you slightly.

Frequently Asked Questions

How much caffeine is in a standard 8-ounce cup of coffee?

An average 8-ounce (240ml) cup of brewed coffee contains about 95mg of caffeine. However, this can range from 70mg to 140mg depending on factors like bean origin, roast level, and brew method. Most coffee drinkers consume within this range daily without issue.

Does espresso have more caffeine than regular coffee?

Espresso has more caffeine per ounce — around 63mg in a single 1-ounce shot — but most people drink it in smaller servings. An 8-ounce brewed coffee generally contains more total caffeine (around 95mg) than a single espresso shot, though a double-shot latte can bring the total close to or above 120mg in just a few ounces.

Is matcha higher in caffeine than coffee?

A typical 1-gram serving of matcha (prepared with 2 ounces of water) contains around 70mg of caffeine, which is similar to a single espresso shot. However, matcha also includes L-theanine, which can moderate the energy spike and create a smoother effect compared to coffee.

How much caffeine is in decaf coffee?

Decaf coffee isn’t caffeine-free. An 8-ounce cup of decaf typically contains 2–5mg of caffeine. While that’s much lower than regular coffee, it’s not zero — so if you’re avoiding caffeine completely, decaf may still have a slight effect.

What drinks have more caffeine than coffee?

Most regular coffee drinks have more caffeine than standard teas or soft drinks, but some energy drinks and espresso-based shots can surpass them. For example, certain energy drinks contain 200–300mg caffeine per 8–16oz serving — far more than an average cup of coffee (95mg).

FrontStreet Coffee Picks for Caffeine Lovers

For those who enjoy a strong caffeine kick, try FrontStreet Coffee’s Ethiopia Humbera — a bright Ethiopian single origin with crisp lemon, bergamot, and floral notes, brewed best as pour-over or espresso. Pair it with their PWN Golden Mandheling, a classic Indonesian offering with deep chocolate, molasses, and a heavy body. For a balanced everyday brew, their Classic Blend combines Brazilian and Ethiopian beans for a sweet, nutty profile with mild acidity. All three deliver bold flavour and reliable caffeine. Freshly roasted within 5 days · Orders placed before 17:00 ship the same day · Next-day delivery across most of Guangdong Province.