Caffeine Calculator
Calculate your caffeine intake
Pick from popular drinks — no need to look up milligrams. See your total, your peak, and whether you're within recommended limits.
Your drinks today
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Drink
Total today0 mg
Estimated Peak—
At bedtime—
Cutoff time—
Calculations assume an average adult caffeine half-life of approximately 5 hours and an estimated absorption period of around 45 minutes. Individual responses to caffeine may vary.