Free · one click · no permissions
Set alarm for 9 AM
The alarm time is preloaded to 9 AM. Click Set alarm and you're done. It shows exactly how long until it rings.
Keep this tab open — the alarm rings from your browser, with a synthesized chime that needs no downloads and no permissions.
To wake at 9 AM, go to bed at
11:45 PM
6 cycles · 9 hours
1:15 AM
5 cycles · 7.5 hours
2:45 AM
4 cycles · 6 hours
Based on 90-minute cycles plus 15 minutes to fall asleep. Real cycles run roughly 70 to 120 minutes and change across the night, so treat these as a better starting point than a guess rather than a schedule to obey.
Waking at 9 AM
A late alarm for shifted schedules, recovery days and night workers. Consistency matters more than the hour itself: a stable 9 AM beats a wandering 7 AM for how you actually feel.
The sleep calculator works the same maths in the other direction if you want to start from a bedtime, and the alarm clock holds as many alarms as you need.
Frequently asked questions
- How do I set the alarm for 9 AM?
- The time field is preloaded to 9 AM — click Set alarm and it's armed. The card below shows exactly how long until it rings.
- Will the alarm ring if my computer sleeps?
- The tab must be open and the computer awake — a browser can't ring from a sleeping machine. Keep the tab open; the page holds your screen awake while an alarm is armed.
- Do I need to allow notifications?
- No. The chime is synthesized inside the page when you set the alarm, so there's no permission prompt and nothing to install.