Sleep Calculator
Calculate optimal sleep times
Sleep Cycle Calculator
Average time to fall asleep: ~15 minutes
Recommended Bedtimes
08:15 PM
7 cycles • 10.5 hours
Optimal
09:45 PM
6 cycles • 9.0 hours
Optimal
✓ Recommended for most adults
11:15 PM
5 cycles • 7.5 hours
Good
✓ Recommended for most adults
12:45 AM
4 cycles • 6.0 hours
Minimum
🌟 Sleep Quality Tips
✓ Keep a consistent sleep schedule
✓ Avoid screens 1 hour before bed
✓ Keep bedroom cool (60-67°F / 15-19°C)
✓ Limit caffeine after 2 PM
✓ Exercise regularly (but not too late)
✓ Create a relaxing bedtime routine
About Sleep Cycles
Each sleep cycle lasts approximately 90 minutes and includes light sleep, deep sleep, and REM stages. Waking up at the end of a cycle (rather than in the middle) helps you feel more refreshed. Most adults need 5-6 complete cycles (7.5-9 hours) for optimal rest.