Caffeine Half-Life & Sleep Disruption Simulator
Interactive in-browser Caffeine Half-Life and Sleep Disruption Simulator. Accurately model how caffeine from drip coffee, espresso, tea, and energy drinks decays over its 5.5-hour half-life. See your exact remaining active caffeine at bedtime and evaluate its impact on Stage 3/4 deep NREM and REM sleep cycles.
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How to Track Blood Caffeine in 3 Steps
Set Target Bedtime
Select what time you plan to go to sleep tonight.
Log Caffeinated Drinks
Add your coffee, tea, espresso, or energy drink intake with consumption times.
Check Bedtime Blood Level
Inspect your 24-hour caffeine curve and download your personalized sleep impact card.
Frequently Asked Questions
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