Set the alarm clock for 10:27 am

 

Leave this tab open — the alarm only rings while the tab stays open.

The alarm goes off in: ::
 
 

Going to bed for a 10:27 am alarm

  • Asleep by 1:12 am — 6 full sleep cycles, about 9 hours
  • Asleep by 2:42 am — 5 full sleep cycles, about 7 hours
  • Asleep by 4:12 am — 4 full sleep cycles, about 6 hours

A sleep cycle runs about 90 minutes, and most people take around 15 minutes to drop off. Waking at the end of a cycle feels easier than waking in the middle of one.

10:27 am across the country

Sydney10:27 am
Brisbane10:27 am
Adelaide9:57 am
Perth8:27 am
Darwin9:57 am

Times are worked out live in your browser, so daylight saving is already accounted for.

Online alarm clock for 10:27 am

You’re finishing the coastguard volunteers’ briefing and preparing to head off, so a 10:27 am alarm can mark the moment to wrap up questions, collect your notes and leave. It gives the group a clear finish without letting the final discussion drift towards 11:00 am, when people may already need to be on their way.

That last part of the briefing can easily draw your attention away from the screen. Set the alarm before the closing discussion and leave its page running where the browser can keep it active. If you close the alarm page or browser, or allow the device to sleep, the coastguard briefing reminder will not sound and your departure could slip later than planned. The device also needs enough volume for the signal to reach you across the room.

As volunteers pack away chairs and gather their gear, the room may be noisier than it was during the main briefing. By late morning, nearby traffic, voices and activity outside can add another layer of sound. A clearly audible tone at 10:27 am, with the device placed near your notes rather than inside a bag, is less likely to disappear beneath that changing background noise.

Common questions

Is there a cost to use this?

No, it's free, with no sign-up and no limit on how many times you set it. It just needs the tab left open until the time you've chosen arrives.

Will the alarm still ring if I close the browser tab?

No. The alarm only runs while this tab stays open — closing it, or closing the browser entirely, stops the countdown before it can ring. Keep the tab open in the background if you need it to go off later.

Does the alarm work if my laptop goes to sleep?

Not reliably. If the device sleeps or the screen locks, the browser tab pauses along with it, so the alarm may not fire on time or at all. Adjust your power settings if you're relying on this over a longer stretch.

Do I need to create an account or download anything?

No, there's nothing to sign up for and nothing to install. Pick a time and a sound, press Start, and it runs entirely in this browser tab.