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Sleep Calculator
Choose a wake time to get bedtimes, or a bedtime to get wake times, based on 90-minute cycles. Results are estimates only.
| Sleep cycles | Sleep time | Go to bed at |
|---|---|---|
| 6 (9.0 hours) | 9.0 hours | 21:46 |
| 5 (7.5 hours) | 7.5 hours | 23:16 |
| 4 (6.0 hours) | 6.0 hours | 00:46 |
Estimates only. Each cycle is taken as 90 minutes, plus 14 minutes to fall asleep. Sleep needs vary by person; this is not medical advice.
Questions
Are sleep calculator results medical advice?
No. They are estimates based on 90-minute sleep cycles and are not a substitute for professional advice.