Sleep Calculator
Find the best bedtime or wake-up time based on 90-minute sleep cycles
Instructions
수면 시간 계산기 사용 설명
기능 소개
사람은 수면 중 얕은 잠과 깊은 잠을 번갈아 겪으며, 한 주기는 약 90분입니다. 주기 끝(얕은 잠 단계)에 깨면 보통 더 개운하고, 깊은 잠 단계에서 깨우면 멍해지기 쉽습니다. 이 도구는 수면을 주기 끝에 맞추도록 도와줍니다.
사용 방법
주의 사항
❓ FAQ
Why are 4 to 6 cycles recommended?
4 cycles is about 6 hours and 6 cycles is about 9 hours, covering the 6-9 hour range most adults need, so you can pick based on how you actually feel.
Does the "How long to fall asleep" field matter?
Very much. It determines when you actually fall asleep, which in turn affects what time the end of a cycle falls on. If you often lie awake for a long time, choose 25 minutes.
Can I use the result as health advice?
No. It is only a schedule conversion based on a common cycle, not aimed at any illness or condition, and it cannot replace the judgment of a doctor or sleep specialist.
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