UK · Energy drinks
How much caffeine is in Red Bull Energy Drink?
80 mgManufacturer listed · 250 ml can32.0 mg per 100 ml, calculated from the listed serving
Red Bull GB lists 80 mg of caffeine in each standard 250 ml can.
Interactive serving
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Adjusted caffeine total80 mgBased on the selected documented serving.
Source and provenance
- Source type
- Manufacturer
- Market
- UK
- Value basis
- Manufacturer listed
- Source reviewed
- 21 August 2026
UK product page for the standard 250 ml can.
Estimated caffeine remaining over time
These figures apply CaffCalc’s exponential model to the adjusted 80 mg starting value. They are calculations, not measurements of caffeine in a particular person.
| Hours elapsed | 3-hour half-life | 5-hour half-life | 7-hour half-life |
|---|---|---|---|
| 0 | 80 mg | 80 mg | 80 mg |
| 3 | 40 mg | 52.8 mg | 59.4 mg |
| 5 | 25.2 mg | 40 mg | 48.8 mg |
| 8 | 12.6 mg | 26.4 mg | 36.2 mg |
| 10 | 7.9 mg | 20 mg | 29.7 mg |
| 12 | 5 mg | 15.2 mg | 24.4 mg |
With the central five-hour model, the estimate falls below 25 mg after approximately 8.4 hours. The faster and slower columns show why one fixed clearance time should not be treated as a personal fact.
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