🌙
Sleep Cycle Calculator
Wake up refreshed by timing sleep in 90-minute cycles
🧬 Sleep Science
⏰ 90-Min Cycles
📊 All Ages
Calculate your ideal sleep times
Based on 90-minute sleep cycles used by sleep researchers worldwide
🌅 I want to wake at…
🌙 I'm going to bed at…
Target wake-up time
Age Group — for personalized recommendations
Infant (0–1 yr)
Toddler (1–2 yrs)
Preschool (3–5 yrs)
School Age (6–12)
Teen (13–18)
Adult (18–64)
Senior (65+)
🌙 Calculate Sleep Times