- Choose Mode — Sleep at or wake at.
- Set Time — Your target sleep or wake time.
- Calculate — See optimal times based on 90-min sleep cycles.
Sleep Cycle Calculator
Calculate optimal sleep and wake times based on 90-minute sleep cycles. Waking between cycles helps you feel more refreshed.
Features
- Two modes: sleep time or wake time
- 90-minute cycle calculation
- 14-minute fall-asleep adjustment
- 3-6 cycle recommendations
Privacy
All calculations run in your browser.