Caffeine in Coca-Cola Coke Zero Sugar
34 mg
per 12 oz can Low
≈ 2.8 mg per fl oz
Barely counts. Sip smugly.
Every serving size
| Serving | Caffeine | % of 400 mg day | Finish by (10:30 PM bed) |
|---|---|---|---|
| 12 oz can (12 oz) | 34 mg | 9% | 10:30 PM |
Cutoff column: average metabolism (5 h half-life), ~50 mg bedtime threshold — run it with your bedtime →
How it compares
Coca-Cola Coke Zero Sugar 34 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
An easy evening choice: at this level, even slow metabolizers usually clear most of it before a normal bedtime. At 34 mg per 12 oz can, this drink is 9% of the FDA's 400 mg daily ceiling for healthy adults.
Source: Manufacturer label · confidence: high
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