🌙 Sleep Calculator

Calculate optimal bedtimes and wake-up times based on 90-minute sleep cycles for the best rest.

What time do you need to wake up?

Recommended Bedtimes

💡 Sleep Tips

Average time to fall asleep: ~14 minutes
Each sleep cycle lasts ~90 minutes
Waking between cycles feels more refreshing
Adults need 5-6 complete cycles (7.5-9 hours)
Keep a consistent schedule, even on weekends