Reference ranges
| Source | Caffeine (mg) |
|---|---|
| Brewed coffee (8 oz) | 95 |
| Espresso shot | 63 |
| Black tea (8 oz) | 47 |
| Cola (12 oz) | 34 |
| Energy drink (8 oz) | 80 |
Common questions
How much caffeine is safe per day?
The FDA cites 400 mg a day as safe for most healthy adults, roughly four cups of coffee.
Does chocolate count?
Yes, though it is small. Dark chocolate has about 12 mg per ounce, so it adds up only with large amounts.


