Sleep Cycle (Wake-up/Bedtime) Calculator
Calculate the ideal bedtime/wake-up time based on 90-minute sleep cycles.
Result
08:15 kalk
Suggested wake-up times: wake at 08:15, wake at 06:45
Result in all units
Step-by-step solution
What Is Sleep Time?
The sleep time calculation suggests an ideal bedtime or wake-up time based on roughly 90-minute sleep cycles. Waking at the end of a cycle makes you feel more refreshed.
How is it calculated?
How Is It Calculated?
- Enter the time you want to wake up or your bedtime.
- 90-minute cycles are counted backward or forward.
- About 15 minutes is added for falling asleep.
Frequently Asked Questions
Why is it good to wake up at the end of a cycle?
Waking during light sleep causes less fatigue than waking from deep sleep.