Caffeine varies widely by drink and serving size. This chart lists typical amounts so you can keep your daily total in check.
| Drink | Serving | Caffeine |
|---|---|---|
| Brewed coffee | 8 oz | 95 mg |
| Cold brew | 8 oz | 100 to 200 mg |
| Espresso | 1 oz | 63 mg |
| Black tea | 8 oz | 47 mg |
| Green tea | 8 oz | 28 mg |
| Energy drink | 8 oz | 80 mg |
| Cola | 12 oz | 35 mg |
| Decaf coffee | 8 oz | 2 mg |
Mind the daily total. Up to about 400 mg a day is considered safe for most adults, roughly four cups of brewed coffee. Cold brew can be much stronger than it tastes.
FAQ
Why does the same drink type list different caffeine amounts in different sources? Caffeine content varies with bean or leaf type, roast, brewing time, and serving size, so published figures are typically averages or ranges rather than fixed values. Treat listed numbers as a general guide rather than an exact measurement.
See the Caffeine Calculator and the Caffeine Content Comparison.