睡眠サイクル計算機
90分の睡眠サイクルを完了できる最適な就寝時刻または起床時刻を提案。
100% client-side · no upload
Suggested bedtimes (includes ~14 min to fall asleep):
How to use
- Enter the time you need to wake up.
- Click Calculate Bedtimes to see six suggested bedtimes.
- Choose a bedtime that gives you 5–6 complete cycles (7.5–9 hours) for full rest.
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よくある質問
- Is this sleep cycle calculator free?
- Yes, completely free with no signup and no usage limits.
- Does my data leave my device?
- No. All calculations run in JavaScript inside your browser. Nothing is sent to any server.
- Does it work on mobile?
- Yes. The calculator is mobile-first and works on iPhone Safari and Android Chrome.
Last updated: By jarvisbox