Sleep Calculator
Find the best time to wake up or go to bed based on natural sleep cycles.
A good night's sleep consists of 5-6 sleep cycles. Note: It takes about 15 minutes to fall asleep.
Sleep Calculator
Waking up in the middle of a deep sleep cycle can leave you feeling tired and groggy (sleep inertia). Our Sleep Calculator helps you time your rest so you wake up at the end of a 90-minute sleep cycle, feeling refreshed and energized.
90-Minute Cycles
Humans sleep in cycles of approximately 90 minutes. Completing a full cycle ensures your brain moves through REM and deep sleep stages properly.
Falling Asleep
Most people take about 14-16 minutes to fall asleep once they close their eyes. Our calculator includes a 15-minute buffer for accuracy.
Tips for Better Rest
- Keep your room cool, dark, and quiet for optimal melatonin production.
- Avoid blue light (phones/laptops) at least 1 hour before your target bedtime.
- Consistency is key—try to wake up at the same time every day, even on weekends.