Caffeine half life calculator is a free tool to track how much caffeine is in your body thought out the day. According to the American Academy of Sleep Medicine the average person has a caffeine half life of 5 hours. This means that drinking coffee late in the afternoon can cause a caffeine build up and result in making it harder to fall asleep.

This was the motivation between making the caffeine half life tracker. You can easily get a chart of when your caffeine is running out, and the deadline for when you should no longer drink any coffee.

Hopefully this tool can help you improve your sleep and know when to drink coffee. Any feedback is greatly appreciated.