Caffeine in Coca-Cola Barq's Root Beer
22 mg
per 12 oz can Low
≈ 1.8 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) | 22 mg | 6% | 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 Barq's Root Beer 22 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 22 mg per 12 oz can, this drink is 6% of the FDA's 400 mg daily ceiling for healthy adults.
'Barq's has bite' — the bite is caffeine; most root beers have none.
Source: Manufacturer label · confidence: high
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Related reading: coffee vs tea vs energy drinks · when to stop before bed