Sleep Calculator
Find the best times to sleep and wake up based on 90-minute sleep cycles
Set your alarm for...
What happens in each 90-minute cycle?
How to use:
- • Choose whether you want to set a wake-up time or a bedtime
- • Enter your desired time to get three sleep schedule options
- • The green "Recommended" option gives you 6 complete cycles (9 hours)
- • Waking up at the end of a cycle reduces grogginess
- • The 14-minute fall-asleep buffer is based on average sleep latency
❓Sleep Calculator FAQ
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