How Much Caffeine Is in Various Drinks? | The Full Breakdown

You probably have a mental chart of which drinks keep you wired. Coffee wakes you up. Tea is gentler. Soda has a small kick. But the actual numbers might surprise you — a single Starbucks venti hot coffee can deliver 390 to 490 mg of caffeine, which is already at or above the recommended daily limit for most people.

The gap between “a cup of coffee” and “your cup of coffee” is wider than most people realize, and tea, soda, energy drinks, and even chocolate-covered coffee beans each land in very different caffeine zones. This guide breaks down common drinks by their actual caffeine content, using data from the Mayo Clinic, USDA, and CSPI.

Brewed Coffee vs Espresso vs Instant

Standard brewed coffee is the most variable drink on the list. A typical 8-ounce cup delivers about 95 mg of caffeine, but the true range stretches from 70 to 140 mg depending on the bean, roast level, and how long the water touches the grounds. Lighter roasts often retain slightly more caffeine than dark roasts, though the difference is small.

A single 1-ounce shot of espresso contains about 63 mg — which means a double-shot latte (126 mg) has roughly the same caffeine as a medium cup of drip coffee, just in a smaller volume. Instant coffee comes in lower at about 62 mg per 8-ounce cup, and decaf drops to roughly 2 mg per cup. If you order a Starbucks dark roast in a 12-ounce “grande” size, you’re looking at 155 to 195 mg.

Why Your Morning Brew Can Vary So Much

Caffeine content isn’t a fixed number on a label for most coffee drinks. The bean type matters — Arabica beans (common in specialty coffee) tend to have less caffeine than Robusta beans (often used in instant coffee and darker roasts). Brewing method also shifts the number significantly.

• Bean type and roast: Robusta beans can contain nearly twice the caffeine of Arabica. Lighter roasts retain slightly more caffeine because the bean spends less time in the heat.
• Brewing method: Cold brew concentrates caffeine more efficiently than hot drip because the longer steeping time extracts more of the compound. A 12-ounce Starbucks cold brew contains 155 mg.
• Serving size: A “cup” can mean 6 ounces to many coffee brewers, but standard nutrition references use 8 ounces. Your travel mug likely holds 12 to 20 ounces, which can multiply the total quickly.
• Brand differences: Dunkin’, Starbucks, and independent shops all use different bean blends and brew ratios. A venti (20-ounce) Starbucks hot coffee hits 390 to 490 mg — that’s one drink, not one cup.

These variables make it worth checking the specific drink you order rather than assuming all coffee is a standard 95 mg per cup. The difference between a small cold brew and a large hot drip can be a factor of two or more.

Tea, Cola, and Energy Drinks

Tea drinkers get a gentler ride. An 8-ounce cup of black tea averages about 47 mg of caffeine, while green tea drops to roughly 28 mg. Herbal teas (peppermint, chamomile, rooibos) are naturally caffeine-free. Soda runs even lower — a 12-ounce can of regular or diet cola contains about 40 mg. Pepsi lands at 36 mg, Mountain Dew at 54 mg, and Dr Pepper at 41 mg. Poppi, the prebiotic soda brand, also clocks in at 40 mg per can.

Drink	Serving Size	Approximate Caffeine
Brewed coffee (drip)	8 oz	70–140 mg
Espresso	1 oz shot	63 mg
Instant coffee	8 oz	62 mg
Black tea	8 oz	47 mg
Green tea	8 oz	28 mg
Regular cola	12 oz can	40 mg
Energy drink	8.5 oz (250 ml)	80 mg

Energy drinks fall roughly in the middle of coffee and soda, with about 80 mg per 8.5-ounce serving. Some specialty energy drinks pack more — SoBe Energy Citrus hits 250 mg in a 20-ounce bottle. And if you snack on dark chocolate-covered coffee beans, you’re getting 336 mg per 28-piece serving, which the USDA tracks in its coffee bean caffeine database.

Caffeine Limits From The FDA And Mayo Clinic

For healthy adults, up to 400 mg of caffeine per day is generally considered safe. That’s roughly four 8-ounce cups of brewed coffee, or about six shots of espresso, or ten cans of cola. But there’s a catch — different drinks reach that limit at very different serving sizes.

1. Stack your drinks mentally. A morning coffee (95–140 mg) plus an afternoon soda (40 mg) and a late energy drink (80 mg) add up to about 215–260 mg. That’s well under 400 mg, but three venti coffees would exceed it.
2. Watch size creep. A 20-ounce Starbucks hot coffee can contain 390 to 490 mg — a single drink that hits or surpasses the daily limit. If you order a large, that’s your whole caffeine budget.
3. Decaf still has a trace. Decaffeinated coffee contains roughly 2 mg per 8-ounce cup, which is negligible for most people but not zero. It can accumulate if you drink several cups.
4. Chocolate counts. Coffee beans coated in dark chocolate deliver 336 mg per serving. A handful of those plus a latte could push you over 400 mg quickly.

Caffeine sensitivity varies by individual, and factors like body weight, medications, and pregnancy can lower the safe ceiling. The general consensus from research reviews is that 400 mg per day doesn’t cause adverse effects in most healthy adults.

Putting The Numbers Together

The difference between a “normal” day of caffeine and an overloaded one often comes down to size and type, not just number of drinks. A small black tea (28 mg) and a large cold brew (155 mg) both count as “one cup,” but they’re five times apart in caffeine. Understanding the drink rather than the container is the key to staying within a comfortable range.

Drink	Caffeine per Serving	What That Looks Like
Starbucks venti hot coffee (20 oz)	390–490 mg	Nearly or exceeds daily limit
Poppi or cola (12 oz)	40 mg	About 10% of daily limit
Mountain Dew (12 oz)	54 mg	13.5% of daily limit
SoBe Energy Citrus (20 oz)	250 mg	62.5% of daily limit
Dark chocolate coffee beans (28 pieces)	336 mg	84% of daily limit

Stick close to the 400 mg per day threshold the safe caffeine limit at Mayo Clinic provides for most healthy adults. If you’re pregnant, breastfeeding, or taking medications that interact with caffeine, the limit is lower and your healthcare provider can give you a personalized number.

The Bottom Line

Caffeine content varies enormously by drink and preparation, from 2 mg in decaf coffee to nearly 500 mg in a large Starbucks hot coffee. Knowing the typical range for each type — brewed, espresso, tea, soda, energy drink — helps you stay under the 400 mg daily threshold without guessing.

For individuals managing caffeine during pregnancy or alongside medications, a pharmacist or primary care provider can tailor that 400 mg guideline to your specific situation — no two caffeine metabolisms are exactly the same.