Source-backed comparison
Coca-Cola vs Diet Coke caffeine in the UK
Compare caffeine in equal 330 ml UK servings of Coca-Cola Original Taste and Diet Coke using Coca-Cola Great Britain product information.
| Measure | Coca-Cola Original Taste | Diet Coke |
|---|---|---|
| Named serving | 330 ml can | 330 ml can |
| Market | UK | UK |
| Caffeine per serving | 34 mg | 46 mg |
| Caffeine per 100 ml | 10.3 mg | 13.9 mg |
| Value basis | Manufacturer listed | Manufacturer listed |
| Estimated after 5 hours | 17 mg | 23 mg |
How to interpret the comparison
- Coca-Cola Great Britain lists 34 mg in a 330 ml Coca-Cola Original Taste and 46 mg in a 330 ml Diet Coke.
- Because the serving volumes are equal, the per-serving and per-100 ml comparisons point in the same direction: the named Diet Coke serving contains 12 mg more.
- The result applies to the named UK products and serving size; it should not be transferred to other cola brands, package sizes or markets.
Calculated five-hour timeline
This table applies the same exponential half-life equation to both starting amounts. It does not show measured blood levels or predict which drink will affect a particular person more.
| Hours after serving | Coca-Cola Original Taste | Diet Coke |
|---|---|---|
| 0 | 34 mg | 46 mg |
| 3 | 22.4 mg | 30.3 mg |
| 5 | 17 mg | 23 mg |
| 8 | 11.2 mg | 15.2 mg |
| 10 | 8.5 mg | 11.5 mg |
| 12 | 6.4 mg | 8.7 mg |
Sources
- Coca-Cola Great Britain caffeine FAQGreat Britain FAQ and serving size.
- Coca-Cola Great Britain caffeine FAQGreat Britain FAQ and serving size.