Sleep Calculator

Sleep Cycle Calculator

Calculate optimal bedtimes or wake-up times based on 90-minute sleep cycles to wake up refreshed.

Sleep Length Calculator

Calculate bedtime or wake-up time based on desired sleep duration.

Sleep Facts

  • You spend about one-third of your life sleeping.
  • REM sleep accounts for 20-25% of your total sleep.
  • Sleep deprivation impairs reaction time like alcohol.

Quick Examples

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