Enter the time you need to wake up and calculate the best bedtimes using full 90-minute sleep cycles.
This calculator works backward from your wake-up time and shows bedtime options for full sleep cycles. It is a planning tool, not medical advice.
SleepQuify’s bedtime calculator estimates the best bedtime options from your target wake-up time using 90-minute sleep cycles and your expected time to fall asleep.
It helps you choose a better bedtime instead of going to sleep at a random time and waking in the middle of a cycle.
The calculator starts from your wake-up time, then subtracts full 90-minute sleep cycles and your selected sleep onset buffer. That creates better bedtime options.
For many adults, 5 full cycles is often a practical target, but 4 or 6 cycles may also fit your schedule.
This is often the most practical balance between getting enough sleep and using a realistic bedtime.
This is a shorter-night option and may be useful when you cannot go to bed as early.
This is a longer full-night option when your schedule allows more sleep.