Wake-Up Time Calculator: When Should You Wake Up?
Wake-Up Time Calculator
Pick when you're going to bed and we'll suggest wake-up times.
Enter the time you plan to go to bed and the calculator adds your fall-asleep time and whole 90-minute cycles to show when you could wake up. It's useful for late nights, naps at odd hours and any time you can't choose your bedtime.
Worked example
For an 11:00 PM bedtime, assuming 14 minutes to fall asleep:
| Wake up at | Cycles | Sleep |
|---|---|---|
| 3:44 AM | 3 cycles | 4.5 hours |
| 5:14 AM | 4 cycles | 6 hours |
| 6:44 AM | 5 cycles | 7.5 hours |
| 8:14 AM | 6 cycles | 9 hours |
Why wake at the end of a cycle
Waking from deep sleep often brings sleep inertia, the groggy, slow feeling that usually fades within 15 to 30 minutes. Waking near the end of a cycle can reduce it, though total sleep matters more than exact timing.
If your alarm is fixed
If you must wake at a set time, use the bedtime calculator instead. Use this page when your bedtime is the fixed point, such as after a late event or a long trip home.
Frequently asked questions
Is it better to wake between cycles?
It can help you feel more alert, but cycles are not identical every night. Getting enough total sleep is the bigger factor.
Why does the calculator add fall-asleep time?
Sleep does not start the moment you lie down. Adding 14 minutes by default keeps the wake-up times realistic, and you can enter a longer time if you take longer.
Why do I still feel tired after a full cycle count?
Sleep debt, alcohol, caffeine late in the day and an irregular schedule can all leave you tired. If it persists, talk to a doctor.
Related guides and tools
- Does waking mid-cycle make you groggy?
- How to wake up feeling refreshed
- How 90-minute sleep cycles work
- Caffeine and sleep
- What sleep latency means
Results are estimates and general information, not medical advice. Talk to a doctor if you have ongoing sleep problems.