Set an alarm for 3:43

⏰ The alarm will ring at 3:43 AM — in 1 h 35 min
Alarm at 3:43 AM
⏰ 3:43 AM
1Hours
:
35Minutes
:
9Seconds
Saturday, October 24, 2026

Set an alarm for another time

Best bedtimes to wake up at 3:43 AM

Go to bed atSleep cyclesSleep
6:28 PM69 h
7:58 PM57 h 30 min
9:28 PM46 h
10:58 PM34 h 30 min

Assumes about 15 minutes to fall asleep and sleep cycles of roughly 90 minutes. Cycle length varies from person to person, so treat these as estimates.

Snooze times after a 3:43 AM alarm

Snooze length1st2nd3rd
5 minutes3:48 AM3:53 AM3:58 AM
9 minutes3:52 AM4:01 AM4:10 AM
10 minutes3:53 AM4:03 AM4:13 AM

Nine minutes is the traditional snooze length on many alarm clocks.

About 3:43 AM

The 3 AM hour is the quietest part of the night for traffic and phone networks, which is why maintenance windows are often scheduled now.

Press “Start Alarm” and keep this tab open; press “Test Alarm” first to check the volume.

About 3:43 AM

12-hour clock3:43 AM
24-hour clock03:43
Military time0343
In wordsSeventeen minutes to four
Part of the dayNight

Questions about a 3:43 alarm

How do I set an alarm for 3:43?

Open this page, press “Start Alarm” and leave the tab open. The alarm rings at 3:43 AM, which is 1 hour, 35 minutes from now.

What time should I go to bed to wake up at 3:43 AM?

For five full sleep cycles, go to bed around 7:58 PM; for six cycles, around 6:28 PM.