Log Drinks · Daily Total · Cutoff Time
Caffeine has a half-life of 5-6 hours. If you drink coffee at 3 PM, half the caffeine is still in your system at 9 PM.
| Bedtime | Last Caffeine By |
|---|---|
| 9 PM | 1 PM |
| 10 PM | 2 PM |
| 11 PM | 3 PM |
| 12 AM | 4 PM |
| Drink | Caffeine |
|---|---|
| Espresso (1 shot) | 63 mg |
| Drip coffee (8oz) | 80-100 mg |
| Drip coffee (16oz) | 160-200 mg |
| Cold brew (12oz) | 150-200 mg |
| Green tea (8oz) | 25-50 mg |
| Black tea (8oz) | 40-70 mg |
| Red Bull (8.4oz) | 80 mg |
| Monster (16oz) | 160 mg |
| Cola (12oz) | 34 mg |
| Dark chocolate (1oz) | 12 mg |