Set the alarm clock for 4:48 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 4:46 amAlarm clock for 4:47 amAlarm clock for 4:49 amAlarm clock for 4:50 am
All alarms from 4:00 am to 4:59 am →

Going to bed for a 4:48 am alarm

  • Asleep by 7:33 pm — 6 full sleep cycles, about 9 hours
  • Asleep by 9:03 pm — 5 full sleep cycles, about 7 hours
  • Asleep by 10:33 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.

Related tools

Online timerOnline stopwatchCountdownDate calculatorsCalendar and datesPublic holidaysAll tools →

How to use the online alarm clock

While preparing early to take meter readings at the substation, set the alarm for 4:48 am before gathering your access card, torch and notes. That gives you a clear prompt ahead of 5:00 am, without relying on a hurried glance at the clock as departure approaches.

Substation readings may happen around humming equipment, ventilation systems or traffic outside, so choose an alarm volume that remains noticeable against the expected background noise. Test the signal from wherever the phone will sit, rather than assuming a loud setting will carry through a bag or another room. Protect the substation readings from a missed alert: this browser alarm works only while its page remains open and the phone stays awake.

The journey to the substation deserves a quick check while you are still preparing at night. Allow for the actual route, the walk from parking and any time needed at the entrance, then work backwards from when the readings must begin. At 4:48 am, a twelve-minute margin before 5:00 am can disappear quickly if keys, identification or directions are not ready, so place those items together before the alarm sounds.

Common questions

After closing this tab, can I still hear the alarm?

If you close the tab before 4:48 am, the alarm will not go off because its countdown ends with the page. The tab may remain out of view while you use another one, but the browser and alarm page must stay open.

Must I keep this tab open until the alarm sounds?

The alarm is tied to the current browser session, so shutting the tab or the whole browser prevents the 4:48 am alert from sounding. Keeping the page open is enough; it can remain in a background tab while you do something else.

What happens if my laptop sleeps before 4:48 am?

If the laptop sleeps before 4:48 am, the browser tab may pause too, so the alarm could sound late or not at all. Keep the device plugged in, adjust its sleep settings, and use a phone alarm as a backup when punctuality matters.

If the laptop enters sleep mode before 4:48 am, what happens?

Once the screen and laptop enter sleep mode, the countdown cannot be trusted to stay active until 4:48 am. Set the computer to remain awake, connect it to power, and add a separate alarm on your phone for an important meeting, school run, or prayer time.