Health & Fitness

Sleep Calculator

Find ideal bedtimes based on sleep cycles.

Wake-up time

Times include ~15 minutes to fall asleep and 90-minute sleep cycles.

6 sleep cycles: 21:45

5 sleep cycles: 23:15

4 sleep cycles: 00:45

3 sleep cycles: 02:15

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Frequently asked questions

We use 90-minute sleep cycles plus 15 minutes to fall asleep.

Most adults feel best with 4-6 sleep cycles.

No. Use it as a guide and consult a professional for sleep issues.