Energy Drinks · Drink database
Caffeine in Red Bull Red Bull Sugarfree
114 mg
per 12 oz can High
≈ 9.5 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) |
|---|---|---|---|
| 12 oz can (12 oz) | 114 mg | 28% | 4:33 PM |
Cutoff column: average metabolism (5 h half-life), ~50 mg bedtime threshold — run it with your bedtime →
How it compares
Red Bull Red Bull Sugarfree 114 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 114 mg per 12 oz can, this drink is 28% of the FDA's 400 mg daily ceiling for healthy adults.
Source: Manufacturer label · confidence: high
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Related reading: coffee vs tea vs energy drinks · when to stop before bed