最適な起床時間の計算ツール
睡眠と回復就寝時間に基づいて最適な起床時間を計算します
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200以上の健康計算ツールに無料でアクセス。結果を保存し進捗を追跡。
Optimal Wake Time Calculator
Wake up refreshed by aligning with your sleep cycles
6:15 AM
Optimal Wake Time (5 cycles)
All Wake Time Options
Your Sleep Cycles
10:45 PM
6:15 AM
💡 Why cycles matter: Each sleep cycle lasts ~90 minutes. Waking up between cycles
(rather than during deep sleep) helps you feel refreshed instead of groggy.
Sleep Stages in Each Cycle
😴
N1 - Light Sleep
Transition stage, easily awakened
~5%
💤
N2 - True Sleep
Heart rate slows, body temperature drops
~50%
🌙
N3 - Deep Sleep
Most restorative, hard to wake
~20%
🌈
REM - Dream Sleep
Vivid dreams, memory consolidation
~25%
Tips for Better Wake-Up
☀️
Get bright light exposure within 30 minutes of waking
⏰
Use a sunrise alarm clock that gradually brightens
🚫
Avoid hitting snooze - it disrupts your cycle
💧
Drink water immediately upon waking
🧘
Do light stretching to increase blood flow
📵
Avoid screens 1 hour before bed
Science-Based: This calculator is based on sleep research showing that each complete
sleep cycle is approximately 90 minutes. Waking at the end of a cycle (during light sleep) rather
than mid-cycle (during deep sleep) helps you feel more refreshed and alert.
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Optimal Wake Time
Wake at the end of a sleep cycle.