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Caffeine Half-Life Calculator
Find out when your coffee leaves your system so you can sleep.
1 Protocol
Hours
:
Mins
Clearance Timeline
After 5 Hours
7:00 PM
100 mg left
After 10 Hours
12:00 AM
50 mg left
Safe to Sleep
12:00 AM
< 50 mg
Popular Variations (1)
The 5-Hour Rule
The average half-life of caffeine is 5-6 hours.- $&
Strategy
Stop caffeine intake 8-10 hours before bed to ensure deep sleep quality (adenosine receptor availability).Explore More Tools
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