Wake up refreshed by timing your sleep to 90-minute cycles. Enter when you want to wake up or go to bed to get optimal sleep and wake times that align with your body's natural sleep rhythm.
The Sleep Cycle Calculator helps you determine the best times to fall asleep based on 90-minute sleep cycles.
If you wake at 7:00 AM, optimal bedtimes are 9:45 PM (6 cycles), 11:15 PM (5 cycles), or 12:45 AM (4 cycles).
The time you want to wake up — we'll work backward to find your ideal bedtimes