Tool collection
half life
WhiskMetrics calculators related to half life.
Caffeine
Caffeine Half-Life Calculator
See how much caffeine from your matcha is still in your system at bedtime, with a 12-hour decay curve based on caffeine's roughly five-hour half-life.
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Caffeine
Matcha Before Bed Calculator
Planning an afternoon or evening matcha latte? See how much caffeine will still be active when you go to sleep, and find a cutoff time that works for you.
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