😴健康
睡眠計算機
Calculate the best bedtime or wake-up time based on 90-minute sleep cycles. Waking up between cycles feels more refreshing than being jolted awake mid-cycle.
Go to bed at one of these times:
00:46
4 cycles
6.0 hrs
23:16✓ Recommended
5 cycles
7.5 hrs
21:46✓ Recommended
6 cycles
9.0 hrs
20:16✓ Recommended
7 cycles
10.5 hrs
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How it works
This 睡眠計算機 runs entirely in your browser — no data is sent to any server. Simply fill in the fields above and the result updates instantly. You can copy the output with the copy button provided.
Frequently Asked Questions
睡眠サイクルの長さは？
1つの完全な睡眠サイクルは約90分で、浅い睡眠・深い睡眠・REMの段階で構成されています。