Coffee & Espresso · Drink database
Caffeine in Flat White
128 mg
per 8 oz (2 ristretto shots) High
≈ 16.0 mg per fl oz
Halfway to the ceiling in one go. Respect.
Every serving size
| Serving | Caffeine | % of 400 mg day | Finish by (10:30 PM bed) |
|---|---|---|---|
| 8 oz (2 ristretto shots) (8 oz) | 128 mg | 32% | 3:43 PM |
Cutoff column: average metabolism (5 h half-life), ~50 mg bedtime threshold — run it with your bedtime →
How it compares
Flat White 128 mg
Green tea (8 oz) 28 mg
Black tea (8 oz) 47 mg
Brewed coffee (8 oz) 96 mg
Monster (16 oz) 160 mg
Bang (16 oz) 300 mg
Spends a serious share of the 400 mg daily ceiling. Treat it as a morning-to-early-afternoon drink unless the calculator says otherwise. At 128 mg per 8 oz (2 ristretto shots), this drink is 32% of the FDA's 400 mg daily ceiling for healthy adults.
Source: Espresso math · confidence: medium
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