Sleep & Caffeine Timeline
Add all your daily drinks with times to visualize how caffeine builds up and decays throughout your day. See exactly how much remains at bedtime.
Try it freeCaffeine Half-Life Calculator
See how caffeine decays in your body hour by hour with an interactive decay curve. Find out when you'll be sleep-safe.
Calculate nowCoffee Cutoff Time
Enter your bedtime and get the latest safe time for your last cup of coffee, tea, or energy drink.
Find your cutoffCaffeine Content Database
Look up caffeine content in 80+ popular drinks. Search by name, filter by category, and compare amounts.
Browse drinksDaily Caffeine Intake
Log everything you drank today and see your total caffeine vs. the recommended 400mg daily limit.
Track intakeCaffeine Comparison
Compare caffeine content in any two drinks side by side. See per-serving, per-ounce, and daily limit stats.
Compare drinksBrew Ratio Calculator
Get the perfect coffee-to-water ratio for drip, French press, pour-over, espresso, cold brew, and more.
Get your ratioCoffee Spending Calculator
Find out how much you spend on coffee per week, month, and year. See fun comparisons of what else that money could buy.
Calculate spending