Caffeine Calculator
Find out when to stop drinking coffee for better sleep
Caffeine stays in your system for hours
Find your perfect cut-off time for quality sleep
What is a Caffeine Calculator?
A caffeine calculator helps you determine the latest time you can safely consume caffeine without disrupting your sleep. Caffeine has a half-life of 5-6 hours, meaning that half of the caffeine you consume remains in your system after that time. Even 12 hours later, 25% is still circulating in your bloodstream.
Many people don't realize their afternoon coffee is keeping them awake at night. By calculating your caffeine cutoff time (typically 6+ hours before bed), you can enjoy your coffee guilt-free while ensuring it won't interfere with falling asleep or reduce your deep sleep quality.
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