Caffeine Sleep Calculator
Find out how much caffeine from coffee is in your system at bedtime
Cup of Coffee #1
100mg caffeine / ~10g of coffee
Results
At your bedtime, you’ll have approximately:
0mg
of caffeine in your system
Note: Adding more cups of coffee has a cumulative effect. This calculator uses caffeine’s half-life of 4 hours.
Note: Regular caffeine consumers tend to metabolize it more efficiently and are less affected by its stimulating effects, meaning they can often maintain better sleep quality with higher levels in their system compared to occasional consumers.