Find the best times to fall asleep or wake up based on natural 90‑minute sleep cycles.
Humans sleep in 90‑minute cycles. Waking up at the end of a cycle helps you feel refreshed. This tool calculates ideal times to fall asleep based on your chosen wake‑up time.
Input:
Wake‑up time: 07:00
Output:
Noah should fall asleep at one of these times: • 10:00 PM • 11:30 PM • 1:00 AM • 2:30 AM • 4:00 AM