Set the alarm clock for 6:38 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 6:38 am alarm

  • Asleep by 9:23 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 10:53 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 12:23 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.

6:38 am across the country

Sydney6:38 am
Brisbane6:38 am
Adelaide6:08 am
Perth4:38 am
Darwin6:08 am

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

Online alarm clock for 6:38 am

Getting your work gear ready ahead of a 6:38 am alarm takes some pressure out of an early construction start. With 22 minutes until 7:00 am, there is enough room for boots, lunch and keys to be lined up before bed, so the morning is less likely to become a rushed search. That preparation suits tradies who need to be moving while much of the neighbourhood is still quiet.

A 6:38 am alarm can remain set while another browser tab is being viewed, but background activity may be restricted by the browser or phone. Keeping the alarm page visible and the sound level checked gives it a clearer chance to run as expected. Closing the browser or allowing the phone to enter sleep mode stops this alarm from sounding, which could leave a construction shift waiting for someone who never heard it. A separate phone alarm provides useful backup for that consequence.

When an early start leaves only a small stretch of sleep before 6:38 am, repeated earlier alarms can break that remaining rest into unhelpful fragments. One backup a few minutes later is more practical than several warnings scattered across the half-hour. Clothes and breakfast arranged the night before also let the final sleeping period continue until the chosen time, without adding an earlier wake-up merely to organise the basics.

Common questions

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.

Can I change the alarm sound?

Yes, there's a short list of tones to choose from before you press Start. Pick whichever one you're most likely to actually hear — softer sounds are easier to sleep through than a firm chime or bell.

What happens once the alarm goes off?

It rings through your device's speakers on a loop until you stop it from this page. There's no separate app notification, so make sure your volume is turned up before you rely on it.