Coffee nap calculator
Calculate the end of a short rest from the time you drink coffee.
Enter a time
Plan a rest right after coffee. Consider caffeine sensitivity and nighttime sleep.
Result
Your results will appear here.
How to use · Frequently asked questions
How to use
Plan a 20-minute rest immediately after coffee.
CDC·NIOSH gives an estimated caffeine onset range of 15–45 minutes, usually described as about 30 minutes.
Effects and sensitivity vary widely, and you may not fall asleep.
Caffeine later in the day may affect nighttime sleep.
Frequently asked questions
Is it suitable for everyone?
Caffeine sensitivity varies. If it makes you uncomfortable, consider resting without coffee.
How is the wake-up time calculated?
The wake-up time is 20 minutes after your input. The separate 15–45-minute caffeine range is a reference; actual effects vary.
Can I try it at night?
Caffeine may affect nighttime sleep. Consider your usual bedtime and sensitivity.