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Caffeine Half-Life Tracker

Caffeine's half-life is ~5–6 hours. Enter what you drank and when — see when you can sleep soundly.

Drink type

Custom caffeine (mg) — if selected above

Time you consumed it

Your target bedtime

⚡ Caffeine Metabolism Timeline

0mgCaffeine Now

0mgAt Bedtime

—Mostly Clear At

—Safe to Sleep

📉 Caffeine Decay