Sleep Calculator
Worked example result
| 6 cycles — 9 hours of sleep | 9:46 PM |
| 5 cycles — 7.5 hours of sleep | 11:16 PM |
| 4 cycles — 6 hours of sleep | 12:46 AM |
To wake at 7:00 AM feeling refreshed, aim to be in bed by 9:46 PM (6 cycles), 11:16 PM (5 cycles) or 12:46 AM (4 cycles) — each including 14 minutes to fall asleep.
Target time ± (cycles × 90 minutes) ± 14 minutes to fall asleep, for 6, 5 and 4 cycles · Powered by CalcHub — Sleep Calculator