Optimize your sleep schedule with science-based calculations for bedtime, wake time, and sleep cycle planning
| Time | Stage | Duration | Description |
|---|---|---|---|
| 23:15 - 23:30 | Falling Asleep | 15 min | Transition from wakefulness to sleep |
| 23:30 - 01:00 | Sleep Cycle 1 | 90 min | Deep sleep dominant - Physical restoration |
| 01:00 - 02:30 | Sleep Cycle 2 | 90 min | Deep sleep dominant - Physical restoration |
| 02:30 - 04:00 | Sleep Cycle 3 | 90 min | Balanced deep sleep and REM - Memory consolidation |
| 04:00 - 05:30 | Sleep Cycle 4 | 90 min | Balanced deep sleep and REM - Memory consolidation |
| 05:30 - 07:00 | Sleep Cycle 5 | 90 min | REM sleep dominant - Mental restoration & dreams |
Recommended sleep for Adults (26-64): 7-9 hours
Go to bed and wake up at the same time every day, even on weekends
Keep your bedroom cool (60-67°F), dark, and quiet for optimal sleep
Avoid screens 1 hour before bedtime to improve sleep quality
Avoid caffeine 6 hours before bedtime as it can disrupt sleep cycles
Regular exercise improves sleep quality, but avoid vigorous activity 3 hours before bed
Your sleep duration aligns well with age-based recommendations
Each 90-minute cycle includes light sleep, deep sleep, and REM stages. Waking at cycle end reduces grogginess.
Your body's natural clock prefers consistent sleep-wake times. Irregular schedules disrupt this rhythm.
Missing sleep accumulates "debt" that can only be repaid with extra sleep, not caffeine or willpower.
REM increases throughout the night. Later cycles contain more REM, crucial for memory and mood.
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