Caffeine Half Life Calculator
When you drink a cup of coffee, the energy boost might fade after a few hours, but the caffeine doesn't simply disappear. Your liver metabolizes caffeine based on a principle called half-life—the time it takes for the concentration of a substance in your body to reduce by exactly 50%.
For the average healthy adult, the half-life of caffeine is 5 hours. This creates an exponential decay curve. If you consume a 160mg energy drink at 12:00 PM:
5:00 PM (5 hours later): 80mg remaining (1 half-life)
10:00 PM (10 hours later): 40mg remaining (2 half-lives)
3:00 AM (15 hours later): 20mg remaining (3 half-lives)
Calculate your caffeine half-life and track how long caffeine stays in your system. Add your coffee or energy drinks to visualize your caffe
