Sleep Cycle Calculator
健康Calculate the optimal time to go to bed or wake up refreshed.
I need to wake up at:
Optimal Bedtimes
A good night's sleep consists of 5-6 complete sleep cycles. Waking up in the middle of a cycle leaves you feeling groggy, so it's better to sleep less and wake up between cycles!
如何使用 Sleep Cycle Calculator
Input the exact time your alarm is set to wake you up in the morning. Adjust the minutes required for you to fall asleep (typically 15). The optimal bedtimes calculator will work backward in 90-minute sleep cycles, suggesting the exact time you must fall asleep to wake up refreshed instead of groggy.
Enter your parameters
Configure the inputs for the Sleep Calculator according to your specific needs.
View real-time results
The utility instantly processes your request and displays the calculated outputs directly in your browser.
Copy or Download
Click the copy icon next to the final output to instantly grab the result, or export it if applicable.