How Much Caffeine Is in Coffee? A Complete Breakdown
A shot of espresso has less caffeine than a mug of drip — which surprises almost everyone. Here is how much caffeine is actually in each kind of coffee, and what changes it.
Amaya Okonkwo
June 6, 2026
5 min
Roast Slow is reader-supported. When you buy through links on this page we may earn an affiliate commission, at no additional cost to you. We only recommend gear we would put on our own counter. As an Amazon Associate we earn from qualifying purchases.
Here is a fact that surprises almost everyone: a single shot of espresso has less caffeine than a standard mug of drip coffee. Espresso tastes intense, so we assume it must hit harder — but flavor strength and caffeine content are different things. If you have ever wondered how much caffeine is actually in your cup, here is the breakdown by type, and what makes the number go up or down.
Caffeine by type of coffee
These are typical figures; actual content varies with the bean, the dose, and the brew. But the relationships hold — and the per-serving numbers are what matter in practice.
- Espresso (single shot, ~30 ml): about 63 mg of caffeine.
- Drip coffee (240 ml / 8 oz mug): about 95 mg — the everyday benchmark.
- Pour-over (240 ml): roughly 90–120 mg, similar to or slightly above drip.
- French press (240 ml): about 80–100 mg.
- Cold brew (240 ml of typical ready-to-drink): about 150–200 mg — usually the highest, because of its strong concentrate.
- Decaf (240 ml): about 2–5 mg — not zero, but close.
Add it up — use the caffeine calculator
Add up your own day: pick each drink and serving and the calculator totals the milligrams, then shows where you land against the 400 mg daily maximum.
Open the calculator95 mg
What actually changes the caffeine
Three things matter most. Dose: more grams of coffee means more caffeine, full stop — this is why a big mug of drip beats a small espresso. Contact time and water: longer steeps and more water extract more caffeine, which is why cold brew, steeped for many hours, runs so high. And bean type: robusta beans have nearly double the caffeine of arabica, though most specialty coffee is arabica. Roast level, despite the myth, barely matters — dark and light roasts have nearly identical caffeine by weight.
How to drink less without drinking worse
If you want to cut caffeine without giving up good coffee, you have two honest options: drink smaller servings of full-strength coffee, or switch some cups to a quality decaf. Modern Swiss Water decaf tastes close enough to the real thing that an afternoon or evening cup need not be a downgrade.
- How much caffeine is in a cup of coffee?
- A standard 8 oz (240 ml) mug of drip coffee has about 95 mg of caffeine. A single espresso shot has around 63 mg, cold brew can run 150–200 mg per serving, and decaf has only about 2–5 mg.
- Does espresso have more caffeine than drip coffee?
- Per serving, no. A single espresso shot has about 63 mg of caffeine versus roughly 95 mg in a full mug of drip. Espresso has more caffeine per ounce, but you drink far less of it, so a normal mug of drip delivers more caffeine overall.
- Does dark roast have more caffeine than light roast?
- Barely — it's largely a myth. By weight, dark and light roasts have nearly identical caffeine. Any difference in your cup comes from how you measure (scooping vs weighing), not the roast level itself.
- Does decaf coffee have caffeine?
- A little. Decaffeination removes about 97% or more of the caffeine, leaving roughly 2–5 mg per cup versus about 95 mg in regular coffee — low enough for evening drinking for most people.
Amaya Okonkwo
Amaya is a sourcing director for a small-batch roastery and has visited more than forty origin farms across East Africa, Central America, and Indonesia.