Coffee & Espresso · Drink database
Caffeine in Brewed Coffee (Drip)
≈ 12.0 mg per fl oz
The ceiling is in sight. The ceiling is not a challenge.
Every serving size
| Serving | Caffeine | % of 400 mg day | Finish by (10:30 PM bed) |
|---|---|---|---|
| 8 oz cup (8 oz) | 96 mg | 24% | 5:47 PM |
| 12 oz mug (12 oz) | 144 mg | 36% | 2:52 PM |
| 16 oz (16 oz) | 192 mg | 48% | 12:47 PM |
| 20 oz (20 oz) | 240 mg | 60% | 11:11 AM |
Cutoff column: average metabolism (5 h half-life), ~50 mg bedtime threshold — run it with your bedtime →
How it compares
Over half the FDA daily limit in one serving. The tracker will flag stacking a second one — and the cutoff calculator will push this earlier than you expect. At 240 mg per 20 oz, this drink is 60% of the FDA's 400 mg daily ceiling for healthy adults.
USDA baseline: 96 mg per 8 oz. Lighter roasts often run slightly higher by weight; brewing strength moves this more than roast does.
Source: USDA FoodData Central · fdc.nal.usda.gov · confidence: high
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