Caffeine Retention Calculator

Track how caffeine levels change in your body over 24 hours and optimize your consumption for better sleep

Your Drinks

Bedtime

Caffeine at Bedtime

17.9mg

Caffeine Out of System By

3:00 AM

Caffeine Levels Throughout Day

Debug Data:
Chart data length: 49
Sample points: 7.5h: 0.0mg, 8h: 28.5mg, 8.5h: 72.8mg, 9h: 92.1mg, 9.5h: 86.4mg
Max caffeine: 92.1mg
Sample data structure: { "hour": 8, "caffeine": 28.5, "isBedtime": false }
Field names: hour, caffeine, isBedtime
Caffeine Level
Bedtime Level