Caffeine Timing Optimizer
Caffeine Cutoff Time
Find when to stop consuming caffeine for good sleep
Caffeine Nap Timer
Optimize the caffeine nap strategy for maximum alertness
Formula
Cutoff Time = Bedtime - (Half-Life x 2) | Caffeine at Bedtime = Dose x 0.5^(Hours/Half-Life) | Half-Life ≈ 5 hours (avg)
Frequently Asked Questions
How long before bed should I stop drinking coffee?
For most people (normal metabolizers), stop caffeine 8-10 hours before bed. Fast metabolizers can cut off 6-8 hours before, while slow metabolizers should stop 10-14 hours before. Caffeine's half-life is 5 hours on average.
What is a caffeine nap?
A caffeine nap involves drinking coffee immediately before a 15-20 minute nap. The nap clears adenosine (sleepiness molecule) from your brain, and the caffeine kicks in right as you wake, resulting in enhanced alertness compared to either alone.
How much caffeine is too much?
The FDA recommends no more than 400mg/day for healthy adults (about 4 cups of coffee). Pregnant women should limit to 200mg. Sensitivity varies by genetics, medications, and tolerance.
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