Set the alarm clock for 3:16 am

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

The alarm goes off in: ::

You can also try the other alarm clocks

Alarm clock for 3:14 am Alarm clock for 3:15 am Alarm clock for 3:17 am Alarm clock for 3:18 am

Going to bed for a 3:16 am alarm

Asleep by 6:01 pm — 6 full sleep cycles, about 9 hours
Asleep by 7:31 pm — 5 full sleep cycles, about 7 hours
Asleep by 9:01 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.

3:16 am across the country

Sydney	3:16 am
Brisbane	3:16 am
Adelaide	2:46 am
Perth	1:16 am
Darwin	2:46 am

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

How to use the online alarm clock

Tradies, nurses on night shift, and anyone driving to the airport before the birds wake up all end up here around 3:16 am. This alarm rings straight from your browser tab at 3:16 am, loud enough to cut through a quiet house, without needing an app or an account first.

Choose a sound before you press Start — something like a chime or a classic bell tends to work better than anything too gentle. Once it's running, the countdown happens right here in the browser, which means the tab needs to stay open in the background rather than being closed.

Unlike a phone alarm, this one won't ring if you close the tab, put the computer to sleep, or shut the lid, so it suits a desk, a kitchen bench, or anywhere the device stays powered on and awake. It's free to use and doesn't need an account, but it's not built for unattended overnight use. On a 24-hour clock 3:16 am is written 03:16, and spoken aloud it's sixteen minutes past three at night. You'll also see it written 3.16 am — a full stop instead of the colon means the same time. Whether you would say set alarm for 3:16 am or put an alarm on for 3:16 am, the steps are the same: pick a sound, press Start, leave the tab open.

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.