Sleep Calculator

Calculate optimal bedtimes and wake times based on 90-minute sleep cycles.

Category: Health · v1.0.0

About This Tool

Plan your sleep schedule around natural 90-minute sleep cycles to wake up feeling refreshed instead of groggy. Enter when you need to wake up to find the best bedtimes, or enter when you're going to sleep to find optimal alarm times. Based on sleep cycle science for better rest quality.

How to Use

  1. Choose mode: 'I need to wake up at...' or 'I'm going to sleep at...'
  2. Enter your target time
  3. View recommended times based on 90-minute sleep cycles
  4. Choose a time that gives you 4-6 complete cycles