How much caffeine is in Red Bull (8.4oz can)?
中文：红牛（8.4 盎司罐）
Caffeine content
80 mg
per 8.4 fl oz (250 ml)
About this drink
Red Bull's standard can has 80 mg caffeine — moderate for an energy drink. The taurine and B vitamins don't add caffeine but contribute to the perceived 'kick'. The China-market 'gold can' Red Bull is different and has only 50 mg.
Ingredients: Caffeine, taurine, B vitamins, sucrose, glucose
When will it clear your system?
80 mg absorbs faster than coffee because energy drinks lack fat to slow gut emptying. A Red Bull at 5pm peaks around 5:45pm and stays in your system until midnight.
Based on caffeine's 5-hour half-life, a Red Bull (8.4oz can) consumed at 2:00 PM drops below the sleep-safe threshold (~20 mg) by approximately 00:00 the same evening.
Where this fits in a daily limit
That's about 40% of the 200 mg pregnancy guideline and 20% of the 400 mg general adult daily limit — comfortably moderate.
See our pregnancy caffeine guide or half-life sleep math for the deep dive.
How it compares
| Drink | Caffeine |
|---|---|
Red Bull (8.4oz can) Red Bull | 80 mg |
| Monster Energy (16oz can) Monster | 160 mg |
| Celsius (12oz can) Celsius | 200 mg |
| Red Bull China (Gold Can) Red Bull | 50 mg |
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Learn more about SipNoteFrequently asked questions
How much caffeine is in a Red Bull (8.4oz can)?
A 8.4 fl oz (250 ml) Red Bull (8.4oz can) contains approximately 80 mg of caffeine. Actual values may range from 80 to 80 mg depending on preparation and source variation.
Is Red Bull (8.4oz can) safe during pregnancy?
The current ACOG and NHS guideline is under 200 mg of caffeine per day during pregnancy. A Red Bull (8.4oz can) fits comfortably within that limit. Always consult your obstetrician for personalized advice.
When should I stop drinking Red Bull (8.4oz can) for sleep?
Caffeine has a 5-hour half-life. To have under 20 mg circulating at bedtime (the typical sleep-safe threshold), stop drinking Red Bull (8.4oz can) about 10 hours before sleep. 80 mg absorbs faster than coffee because energy drinks lack fat to slow gut emptying. A Red Bull at 5pm peaks around 5:45pm and stays in your system until midnight.
Red Bull (8.4oz can) vs Monster Energy (16oz can) — which has more caffeine?
Red Bull (8.4oz can) contains 80 mg per serving; Monster Energy (16oz can) contains 160 mg per 16 fl oz (473 ml). Monster Energy (16oz can) is the stronger of the two.
Does Red Bull (8.4oz can) keep you awake?
80 mg is moderate caffeine. Most people can drink Red Bull (8.4oz can) in the afternoon without notable sleep impact.
Caffeine values shown are typical for the listed serving size. Actual content varies by preparation, brewing method, batch, and brand reformulation. Not medical advice — consult a healthcare provider for personalized guidance.