How much caffeine is in coffee
These are averages. A real cup changes with the beans, the recipe and the cafe that made it.
| Drink | Serving | Caffeine |
|---|---|---|
| Brewed coffee | 8 oz cup | 95 mg |
| Brewed coffee | 12 oz mug | 142 mg |
| Brewed coffee | 16 oz | 189 mg |
| Espresso | 1 shot | 63 mg |
| Espresso | 2 shots | 125 mg |
| Instant coffee | 8 oz cup | 62 mg |
| Decaf coffee | 8 oz cup | 2 mg |
| Black tea | 8 oz cup | 47 mg |
| Green tea | 8 oz cup | 28 mg |
| Cola | 12 oz can | 32 mg |
Espresso has more per ounce and less per drink
A shot of espresso packs about 63 mg into a single ounce, while brewed coffee has about 12 mg per ounce.
But a drink is bigger than a shot. A 12 oz mug of brewed coffee has about 142 mg, and a latte made with two shots has about 125 mg.
Does dark roast have more caffeine?
Not reliably. Roasting destroys very little caffeine, so how much coffee you use and how you brew it matter far more than the roast.
Frequently Asked Questions
How much caffeine is in a cup of coffee?
An 8 oz cup of brewed coffee has about 95 mg, and a 12 oz mug has about 142 mg. These are USDA averages, and a real cup varies.
How much caffeine is in a shot of espresso?
One shot has about 63 mg and a double has about 125 mg.
How much caffeine is too much?
The FDA cites 400 mg a day as an amount not generally associated with negative effects for most adults, but it varies from person to person. If you are pregnant or breastfeeding, or you have a health condition, ask your health care provider.
Does decaf coffee have caffeine?
A little. USDA data puts brewed decaf at about 2 mg per 8 oz cup, and the FDA says decaf typically has 2 to 15 mg per 8 oz cup.
Does espresso have more caffeine than coffee?
Per ounce it does, but per drink it often does not. A double shot has about 125 mg, while a 12 oz mug of brewed coffee has about 142 mg.
Where the numbers come from: caffeine values are averages from USDA FoodData Central. The 400 mg a day figure is from the FDA. This page is general information and not medical advice.