Sleep Calculator

Calculate:

Bedtime (I want to wake up at…) Wake-up Time (I go to bed at…)

Wake-up Time:

Number of Sleep Cycles:

Time to Fall Asleep (minutes):

Result:

Enter a time to calculate your sleep schedule.

Total Sleep Duration: 0 hours 0 minutes

Sleep Calculator: Optimize Your Rest & Wake Refreshed

Discover your ideal bedtime or wake-up time based on natural sleep cycles (90-minute phases) for maximum energy.

How to use:

Choose Mode:
- “Bedtime” (calculate when to sleep)
- “Wake Up” (calculate when to wake)
Set Target Time: e.g., 06:30 AM wake-up
Get Recommendations:
- 4-6 bedtimes/wake times (multiple cycle options)
- Avoid grogginess by waking between cycles

Goal	Target Time	Sleep Cycles	Optimal Times
Early Flight	Wake at 4:00 AM	5 cycles	Bed at 8:30 PM or 11:00 PM
Night Shift Worker	Sleep at 9:00 AM	4 cycles	Wake at 2:30 PM or 5:00 PM
Exam Prep	Peak focus at 9:00 AM	6 cycles	Sleep at 8:00 PM or 11:30 PM

➤ Check any year:
Leap Year Calculator