An americano has exactly as much caffeine as the espresso shots in it, and at Starbucks that is 75 mg for a short, 150 mg tall, 225 mg grande and 300 mg venti. A double-shot americano from an independent cafe lands somewhere between about 125 mg and 155 mg, depending on the dose and the beans.
The hot water is the part people overthink. It changes the volume and the taste, not the caffeine. The only decision that moves the number is how many shots go in the cup, and at most chains that decision is tied to the cup size rather than to anything you ask for.
Starbucks Caffe Americano by size
| Size | Espresso shots | Caffeine |
|---|---|---|
| Short (8 oz) | 1 | 75 mg |
| Tall (12 oz) | 2 | 150 mg |
| Grande (16 oz) | 3 | 225 mg |
| Venti (20 oz) | 4 | 300 mg |
Figures from Caffeine Informer's Starbucks guide, which compiles Starbucks published nutrition data. Starbucks adds one shot per size step for this drink, which is why a grande americano carries more caffeine than a grande latte (150 mg, two shots) in the same cup.
Order it with Blonde espresso and each shot goes up: the same guide lists the Blonde Caffe Americano at 85, 170, 255 and 340 mg for short through venti.
What a shot is worth outside Starbucks
Starbucks counts 75 mg per shot. Independent cafes do not publish a number, so the closest thing to a standard is the USDA figure for restaurant-prepared espresso: 212 mg of caffeine per 100 g, which works out to about 63 mg per fluid ounce. A 1 oz single shot is roughly 63 mg on that basis, and a double is about 125 mg.
Real shots spread wider than that. Caffeine Informer lists a shot at 77 mg per 1.5 fl oz and cites a study of double shots from different outlets that ranged from 58 mg up to 185 mg. Dose matters most: a cafe pulling 20 g doubles will put more caffeine in your americano than one pulling 14 g, and a robusta-heavy blend pushes it higher still. If your local shop feels stronger than the chain, that is usually why.
Americano vs drip coffee
Brewed coffee is weaker per ounce but you drink more of it. USDA puts brewed coffee at 40 mg of caffeine per 100 g, which is about 95 mg for an 8 oz cup and roughly 140 mg for 12 oz. A tall Starbucks americano (150 mg) and a 12 oz drip are close; a grande americano at 225 mg pulls ahead of a same-size drip only because it has three shots in it. For more on how the two drinks differ beyond caffeine, see americano vs coffee.
How to get the number you want
Ask for the shot count, not the size. A tall americano with one shot is 75 mg; a short with two shots is 150 mg. Decaf shots at Starbucks and most cafes are not zero, but the chain does not publish a per-shot decaf figure for espresso, so treat a decaf americano as low rather than caffeine-free. Iced americanos use the same shot counts as hot, so the numbers above carry over.
For context, the FDA cites 400 mg of caffeine a day as an amount not generally associated with negative effects in healthy adults. That is information, not advice. How caffeine affects you depends on your own tolerance and health.
Other drinks are in the caffeine database.
FAQ
Does the water in an americano reduce the caffeine?
No. Water dilutes taste and adds volume. The caffeine is fixed by the number and size of the espresso shots.
Is a grande americano stronger than a grande latte?
Yes at Starbucks: the americano gets three shots (225 mg) and the latte two (150 mg), per the chain's published figures compiled by Caffeine Informer.
Sources
- Caffeine Informer, Starbucks grande Caffe Americano
- Caffeine Informer, the complete guide to Starbucks caffeine
- USDA FoodData Central, SR Legacy 171891, coffee, brewed, espresso, restaurant-prepared (212 mg caffeine per 100 g)
- Caffeine Informer, espresso shot
- USDA FoodData Central, SR Legacy 171890, coffee, brewed, prepared with tap water (40 mg caffeine per 100 g)
- FDA, Spilling the Beans: How Much Caffeine is Too Much?
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