HomeCalcPro — 프로젝트 계산 보고서
Tool: Sleep Calculator — 무료 온라인 계산기 | HomeCalcPro | 인쇄 일시:
Sleep Calculator — 무료 온라인 계산기 | HomeCalcPro
Sleep Calculator에 대한 정확하고 신속한 실시간 계산 및 공식 제공.
Parameters & Body Metrics
Health & Fitness Targets
Evidence-BasedEnter your parameters above to compute your target metrics.
90-Minute Sleep Cycle Formula
Transparent mathematical methodology explained in plain English.
Wake Time = Bedtime + (14 min to fall asleep) + (N × 90 min Sleep Cycles) (Ideal N = 5 or 6 cycles)A complete human sleep cycle lasts approximately 90 minutes. Waking at the end of a cycle rather than mid-deep sleep minimizes morning grogginess.
Variables Explained:
- Desired Wake-Up Time: Time you must wake up in the morning.
- Average Time to Fall Asleep: Standard clinical average is 14 minutes.
Waking Up at 6:30 AM (Targeting 5 Cycles = 7.5 Hours Sleep)
Calculating optimal bedtimes to complete full REM cycles.
- 5 Sleep Cycles (7.5 hours): 6:30 AM - 7 hrs 30 min = 11:00 PM.
- Add 14 min sleep latency: Go to bed at 10:46 PM.
- 6 Sleep Cycles (9.0 hours): Go to bed at 9:16 PM.
자주 묻는 질문 (FAQ): Sleep Calculator
Click any question below to expand quick answers, formulas, and expert tips.
Why do you feel tired after 8 hours of sleep?
If an alarm wakes you up in the middle of Stage 3 deep slow-wave sleep rather than at the end of a 90-minute cycle, you experience sleep inertia (prolonged morning grogginess).
How many sleep cycles do adults need per night?
Most healthy adults require 5 to 6 complete cycles per night (7.5 to 9.0 total hours of sleep) for optimal cognitive performance and hormonal recovery.