Quick answer: a standard 8 oz cup of drip coffee has about 95 mg of caffeine, a single espresso shot about 63 mg, and a 12 oz cold brew anywhere from 150 to 240 mg. But the exact number depends on the bean, roast, brew method, and serving size. Here’s the full breakdown by type.
Caffeine by Coffee Type (Quick Chart)
| Coffee type | Typical serving | Caffeine |
|---|---|---|
| Drip coffee | 8 oz | ~95 mg |
| Espresso (single) | 1 oz shot | ~63 mg |
| Espresso (double) | 2 oz | ~125 mg |
| Latte / cappuccino | 1 shot base | ~63 mg |
| Cold brew | 12 oz | ~150–240 mg |
| Instant coffee | 8 oz | ~60–80 mg |
| Decaf coffee | 8 oz | ~2–5 mg |
Caffeine Content by Coffee Type
Drip Coffee
Drip coffee is a classic choice and offers a moderate amount of caffeine. On average, an 8 oz cup contains about 95 mg, though this varies with the brewing method and the coffee-to-water ratio you use — dial that in with our coffee-to-water ratio guide.
Espresso
Espresso is known for its bold flavor and small serving size. A single 1 oz shot contains roughly 63 mg of caffeine. It’s more concentrated than drip, but because the serving is small, you actually get less total caffeine per shot — unless your drink uses two or more shots.
Cold Brew
Cold brew is one of the strongest options for caffeine. A 12 oz serving can contain anywhere from 150 to 240 mg, thanks to the long steeping process and high coffee-to-water ratio used to make the concentrate. Learn to make it in our cold brew recipes guide.
Which Coffee Beans Have More Caffeine?
The bean matters. Arabica is smoother and lower in acidity but has less caffeine, averaging about 1.2% by weight. Robusta is more common in instant coffee and espresso blends and carries roughly 2.2% caffeine by weight — nearly double. For the full comparison, see Arabica vs Robusta, or drill into a single bean with how much caffeine is in a coffee bean.
Does Roast Level Affect Caffeine?
Many people assume darker roasts have more caffeine because of their bold flavor, but it’s the opposite. Light roast retains slightly more caffeine by weight because it’s roasted for less time. Dark roast loses a little during roasting, though its lower density means you may use more beans by weight per scoop, evening things out. Medium roast lands in between. Dig deeper in what roast of coffee is the strongest.
Other Factors That Affect Caffeine
- Brewing method: French press, pour-over, and AeroPress each extract caffeine a bit differently.
- Serving size: a bigger cup simply means more caffeine — watch your portions.
- Grind size: a finer grind increases surface area and can extract more caffeine.
Why Knowing Your Caffeine Content Matters
Understanding how much caffeine is in your cup helps you match your coffee to your day — a strong morning pick-me-up or a lighter afternoon cup. Most healthy adults can safely have up to about 400 mg of caffeine per day (roughly four 8 oz cups). For timing and daily limits, see the best time to drink coffee and how many cups per day is too many.
Frequently Asked Questions
How much caffeine is in a cup of coffee?
An 8 oz cup of drip coffee has about 95 mg of caffeine on average, though it ranges roughly 70–140 mg depending on the beans, roast, and strength.
Does espresso have more caffeine than coffee?
Per ounce, yes — espresso is far more concentrated. But a full mug of drip coffee usually has more total caffeine than a single espresso shot, because the serving is much larger.
Which coffee has the most caffeine?
Among common drinks, cold brew tops the list (150–240 mg per 12 oz). Beyond that, Robusta beans and a higher coffee-to-water ratio push caffeine higher still.
Try Berk’s Beans Coffee Today
At Berk’s Beans Coffee, we roast high-quality beans across a range of roasts to order in Concord, CA, so you can pick the right cup for your taste and caffeine needs. Explore our selection and taste the difference fresh makes.
Sources & Citations
- FDA Consumer Update — up to 400mg caffeine/day is safe for most healthy adults
- Peer-reviewed food chemistry research — Robusta ~2.2% caffeine vs Arabica ~1.2% by weight
- NIH Office of Dietary Supplements — caffeine content varies by bean, roast, and brewing method
