Optimal schedule
21:00
Go to bed at:
Closest to the optimal recovery time for your age and current time to fall asleep.
21:00 is an early start to the night, often useful before an early shift or after an exhausting day. The calculator starts at this bedtime and estimates wake-up options using complete sleep cycles.
Falling asleep
21
Default time to fall asleep
15 min
Result
04:45
Your best wake-up time is calculated immediately.
Results
Optimal schedule
21:00
Go to bed at:
Closest to the optimal recovery time for your age and current time to fall asleep.
Standard schedule
21:00
Go to bed at:
A balanced option for a practical compromise between sleep duration and your daily schedule.
Minimum schedule
21:00
Go to bed at:
A shorter fallback when you need complete cycles despite having limited time.
Short schedule
21:00
Go to bed at:
A shorter fallback when you need complete cycles despite having limited time.
This can suit parents going to bed with their children, early-shift workers or people who want to get up before dawn without cutting their night short. An early bedtime deserves a matching morning plan.
An early night leaves substantial room for recovery. Compare the cycle-based wake-up estimates while making sure you allow enough total sleep.
The calculator offers several cycle-based wake-up estimates and adds 15 minutes for falling asleep by default.
Not if you feel sleepy and maintain that rhythm regularly. Going to bed before you are ready can leave you awake during the night.
Choose an option with enough sleep and keep the bedroom dark and quiet to reduce unwanted early waking.
If you are choosing between bedtimes, compare nearby schedules. This helps you see whether shifting bedtime by 30–60 minutes gives you a better wake-up time.