Set the alarm clock for 5:42 am

 

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

The alarm goes off in: ::
 
 

Going to bed for a 5:42 am alarm

  • Asleep by 8:27 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 9:57 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 11:27 pm — 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.

5:42 am across the country

Sydney5:42 am
Brisbane5:42 am
Adelaide5:12 am
Perth3:42 am
Darwin5:12 am

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

Online alarm clock for 5:42 am

While packing for a day charter the night before, you can set a 5:42 am alarm for the point when preparation turns into departure. That leaves the early routine anchored to a specific moment: check the weather, collect food and water, and be ready to head towards the marina before 6:00 am. The time is early enough to allow a calm start without treating the round hour as the actual wake-up time.

A charter morning depends on the alarm sounding after several quiet hours, so the browser needs to remain active until 5:42 am. Select the time, confirm the alarm is armed, and leave the sound volume at a level you will hear. The charter departure could be missed if the browser stops running or the phone or computer goes to sleep before the alarm fires. For that reason, this alarm suits an awake, powered setup; a separate phone alarm provides sensible backup for an overnight wait.

Before an early marina departure, the useful sleep is the uninterrupted stretch that comes before 5:42 am. Packing clothes, checking the forecast and placing keys beside the bag earlier in the evening can protect that remaining rest from last-minute searching. Keeping the phone across the room also makes the alarm easier to hear and reduces the chance of silencing it without fully getting up.

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.