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Sleep Calculator

Estimate bedtime options for a target wake-up or wake-up times for a chosen bedtime using 90-minute cycles and time to fall asleep.

TODO-i18n: this tool's instructions and FAQs are currently available in English.

使用指南

交互式工具区

无需注册账号

Sleep cycle calculator

Calculations run locally in your browser. No account or server-side calculation is needed.

Suggested bedtimes (about 90-minute cycles)
  • 9:45 PM · 6 cycles / 9 hours asleep, plus 15 minutes to fall asleep
  • 11:15 PM · 5 cycles / 7.5 hours asleep, plus 15 minutes to fall asleep
  • 12:45 AM · 4 cycles / 6 hours asleep, plus 15 minutes to fall asleep
Sleep Calculator是什么?

Estimate bedtime options for a target wake-up or wake-up times for a chosen bedtime using 90-minute cycles and time to fall asleep.

工作原理

Estimate bedtime options for a target wake-up or wake-up times for a chosen bedtime using 90-minute cycles and time to fall asleep.

常见用途

Estimate bedtime options for a target wake-up or wake-up times for a chosen bedtime using 90-minute cycles and time to fall asleep.

使用限制

Estimate bedtime options for a target wake-up or wake-up times for a chosen bedtime using 90-minute cycles and time to fall asleep.

常见问题
Sleep Calculator是什么?
Estimate bedtime options for a target wake-up or wake-up times for a chosen bedtime using 90-minute cycles and time to fall asleep.

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