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睡眠サイクル計算
起きる時刻から90分の睡眠サイクルを逆に数えて、寝るのに最適な時刻を調べます。
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How to use it
1Step 1Fill in Wake-up time
2Step 2Change a value and the result updates instantly
3Step 3Save or copy the result
If the result looks off
The result looks wrong
Check the units and the baseline first. Changing a value updates the result instantly.
I want the starting values back
Press reset to return to the initial state.
よくある質問
Why 90 minutes?
One REM-plus-non-REM cycle is about 90 minutes, so waking at a cycle boundary feels easier.
Does falling asleep time matter?
Yes — the minutes you need to drift off are subtracted before counting cycles.