Caffeine Metabolism Calculator
Calculate remaining caffeine levels in your bloodstream based on intake time and amount
Caffeine Intake Information
Caffeine Metabolism Information
Caffeine Half-life
The half-life of caffeine averages 5-6 hours, but varies greatly among individuals. It can range from 3-7 hours depending on age, weight, liver function, smoking status, pregnancy, and other factors.
Impact on Sleep
- Caffeine increases the time it takes to fall asleep
- Reduces deep sleep duration, lowering sleep quality
- Increases frequency of nighttime awakenings
- Can interfere with REM sleep
Recommendations
- Adults should limit intake to 400mg or less per day
- Stop caffeine intake 6 hours before bedtime
- Pregnant women should limit to 200mg or less
- Those with caffeine sensitivity should consume even less
Disclaimer
This calculator is for reference only. If you have caffeine sensitivity or health issues, please consult with medical professionals.