Set an alarm for 3:40
⏰ The alarm will ring at 3:40 AM — in 2 h 27 min
Set an alarm for another time
Best bedtimes to wake up at 3:40 AM
| Go to bed at | Sleep cycles | Sleep |
|---|---|---|
| 6:25 PM | 6 | 9 h |
| 7:55 PM | 5 | 7 h 30 min |
| 9:25 PM | 4 | 6 h |
| 10:55 PM | 3 | 4 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 3:40 AM alarm
| Snooze length | 1st | 2nd | 3rd |
|---|---|---|---|
| 5 minutes | 3:45 AM | 3:50 AM | 3:55 AM |
| 9 minutes | 3:49 AM | 3:58 AM | 4:07 AM |
| 10 minutes | 3:50 AM | 4:00 AM | 4:10 AM |
Nine minutes is the traditional snooze length on many alarm clocks.
About 3:40 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 3:40 AM
| 12-hour clock | 3:40 AM |
|---|---|
| 24-hour clock | 03:40 |
| Military time | 0340 |
| In words | Twenty minutes to four |
| Part of the day | Night |
Questions about a 3:40 alarm
How do I set an alarm for 3:40?
Open this page, press “Start Alarm” and leave the tab open. The alarm rings at 3:40 AM, which is 2 hours, 27 minutes from now.
What time should I go to bed to wake up at 3:40 AM?
For five full sleep cycles, go to bed around 7:55 PM; for six cycles, around 6:25 PM.