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Sleep Calculator

Find the best bedtime or wake-up time based on 90-minute sleep cycles

90 minutes / cycle
Note: Sleep cycles are estimated at the common 90 minutes, and this is only meant to help you plan your schedule. Everyone's sleep needs differ, so this cannot replace advice from a doctor or sleep specialist; if you have trouble sleeping for a long time, please seek medical attention promptly.

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


  • 먼저 「잠드는 데 걸리는 시간」을 선택하세요: 누워서 실제로 잠들 때까지의 시간, 보통 15분

  • 모드 1 「지금 자면 몇 시에 깨나」: 현재 시간부터 4-6주기를 차례로 계산

  • 모드 2 「몇 시에 일어나려면 몇 시에 자야 하나」: 일어나고 싶은 시간을 입력하면 몇 시에 자야 하는지 역산

  • 각 시간 아래에 몇 주기를 채울 수 있는지, 합계 몇 시간인지 표시됩니다


    • 주의 사항


  • 90분은 일반적인 추정값이며 개인차가 크므로 자신의 실제 느낌을 기준으로 하세요

  • 추천 시간 전후 15분 이내에 자는 것도 적합합니다

  • 이는 수면 계획 도구이며 의학적 조언이 아닙니다; 장기간 잠들기 어렵거나 낮에 극도로 졸리면 진료를 받으세요

    • ❓ 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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