Wake up at 9:45 AM after 7.5 hours of sleep, or 11:15 AM after 9 hours.
These times let you finish whole 90-minute sleep cycles, including 15 minutes to fall asleep.
If you go to bed at 2:00 AM, wake up at one of these times:
Includes 15 minutes to fall asleep. Adults need 7 to 9 hours, so 7.5 hours (5 cycles) is marked as the best fit.
| Wake up at | Sleep | Cycles | |
|---|---|---|---|
| 11:15 AM | 9 hours | 6 | Good for teens and people who need more sleep |
| 9:45 AM | 7.5 hours | 5 | Recommended for most adults |
| 8:15 AM | 6 hours | 4 | Short: below the 7-hour minimum |
| 6:45 AM | 4.5 hours | 3 | Very short: only for an emergency |
| Time to fall asleep | Wake up after 5 cycles | Wake up after 6 cycles |
|---|---|---|
| 5 minutes | 9:35 AM | 11:05 AM |
| 15 minutes | 9:45 AM | 11:15 AM |
| 30 minutes | 10:00 AM | 11:30 AM |
Going to bed after midnight is common, but it makes it hard to get 7 hours before a normal morning start. If you have to get up early, a 20-minute nap in the early afternoon can help, and the sleep debt calculator shows how much sleep you are missing.
For general information only, not medical advice. If you often feel tired despite enough sleep, snore loudly, or have trouble sleeping most nights, talk to a doctor.