CalcStack
Calculators
AI Builder
🇺🇸 EN
🇨🇳 中文
🇮🇳 हिन्दी
🇪🇸 ES
🇸🇦 العربية
🇵🇰 اردو
Sleep Cycle Calculator
Ideal sleep/wake times by 90‑min cycles.
Bedtime
Cycle Length (min)
Cycles
Suggested wake-up times
00:30
02:00
03:30
05:00
06:30
Sleep Cycle Calculator | CalcStack | CalcStack