Caffeine is a powerful stimulant that can significantly impact sleep quality. Understanding how long it stays in your system is key to enjoying its benefits without the downsides.

Understanding Caffeine Half-Life

The half-life of a substance is the time it takes for the body to eliminate half of it. Caffeine has an average half-life of about 5 hours. This means that 5 hours after your coffee, half of the caffeine is still in your system.

Calculate Your Caffeine Clearance Time

Curious about your own consumption? Enter the amount of caffeine and the time you had it into our Caffeine Calculator to see when it will be mostly cleared from your system. Our Sleep Cycle Calculator can also help you plan your bedtime.