Question 1

How does the sleep calculator work?

Accepted Answer

Our sleep calculator uses 90-minute sleep cycles to determine optimal bedtimes and wake-up times. It adds 15 minutes for falling asleep and calculates 6 different options based on complete sleep cycles to help you wake up refreshed.

Question 2

What time should I go to bed?

Accepted Answer

The optimal bedtime depends on when you want to wake up. Use our sleep calculator to find the perfect bedtime based on 90-minute sleep cycles. Most adults need 7-9 hours of sleep, which equals 5-6 complete sleep cycles.

Question 3

How long are sleep cycles?

Accepted Answer

Sleep cycles are approximately 90 minutes long. Each cycle includes light sleep, deep sleep, and REM sleep phases. Waking up at the end of a complete cycle helps you feel more refreshed and less groggy.

Question 4

Can I download calendar reminders?

Accepted Answer

Yes! SleepPlanner lets you download .ics calendar files that work with iPhone Calendar, Google Calendar, Outlook, and other calendar apps. You can set one-time or recurring weekday reminders with automatic notifications.

🌙 Sleep Calculator

🌙 Sleep Calculator