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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.

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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
¿Qué es 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.

Cómo funciona

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.

Usos habituales

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.

Limitaciones

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.

Preguntas frecuentes
¿Qué es 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.

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