Sleep Calculator – Sleep Cycle and Bedtime Calculator

Calculate optimal bedtime and wake times based on sleep cycles. Improve your sleep quality by timing your sleep to natural 90-minute cycles.

Sleep Calculator – Sleep Cycle and Bedtime Calculator

Calculate optimal bedtime and wake times based on sleep cycles. Improve your sleep quality by timing your sleep to natural 90-minute cycles.

What to calculate

Enter wake time or bedtime (e.g., 7:00 AM)

Number of 90-minute sleep cycles

Time needed to fall asleep

Age for sleep recommendations

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Visualization will appear here

Understanding Sleep Cycles

Sleep occurs in 90-minute cycles consisting of light sleep, deep sleep, and REM sleep. Waking up at the end of a complete cycle helps you feel more refreshed and alert.

How to Use This Calculator

Follow these simple steps to get accurate results:

  1. Enter your calculate
  2. Enter your target time
  3. Enter your sleep cycles
  4. Enter your time to fall asleep (minutes)
  5. Enter your age (optional)
  6. Click the "Calculate" button to see your results
  7. Review the detailed breakdown and explanation

Why Use Our Sleep Calculator – Sleep Cycle and Bedtime Calculator?

  • 100% free and no registration required
  • Instant, accurate calculations with professional formulas
  • Mobile-friendly design that works on any device
  • Privacy-focused - your data never leaves your browser
  • Educational content to help you understand the results

Frequently Asked Questions

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