Plan a bedtime from your wake time, approximate sleep cycles and time to fall asleep. Sleep cycles vary between people.
Estimate a bedtime from a desired wake time, sleep-cycle planning assumption and time needed to fall asleep. Sleep Calculator uses a simplified cycle model for planning. Actual sleep architecture varies, so the suggested time is not a diagnosis or a guarantee of sleep quality. How to use Sleep Calculator: Enter the time you need to wake. Choose a cycle count and approximate time to fall asleep. Review suggested bedtime options and adjust for your real routine and sleep needs. Common uses: Bedtime planning Routine building General sleep education Are sleep cycles exactly 90 minutes? No. Cycle duration varies between people and across the night. Does the calculator diagnose sleep problems? No. Persistent sleep problems should be discussed with an appropriate health professional. Why include time to fall asleep? It helps distinguish target sleep time from the time you should get into bed.