Sleep Calculator
Estimate suggested sleep and wake times using common 90-minute sleep-cycle planning.
This is a planning estimate, not medical advice. Individual sleep needs vary.
How to use this calculator
What to enter
Enter or select the following as requested: I want to; Time; Time to fall asleep (minutes). Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The sleep-related result estimates a schedule or duration from the time and assumptions entered. Sleep cycles and individual sleep needs vary, so the calculated time is only a planning guide and cannot determine sleep quality or diagnose a sleep disorder.
When to use it
Use this to plan a bedtime, wake-up time, or sleep routine. Prioritize adequate regular sleep; seek medical advice for persistent sleep problems or significant daytime impairment.