⏰ iAlarmClock

Set Alarm for 3:15 AM

One click sets a 3:15 AM alarm in your browser. 3:15 AM is … from now.

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    Keep this tab open and your device awake for the alarm to ring.

    What time should I go to bed to wake up at 3:15 AM?

    Sleep runs in cycles of roughly 90 minutes. Waking at the end of a cycle — rather than in the middle of deep sleep — usually feels easier. Assuming it takes about 15 minutes to fall asleep, aim for one of these bedtimes:

    BedtimeSleep you'll get
    6:00 PM6 cycles · 9 h of sleep (recommended)
    7:30 PM5 cycles · 7.5 h of sleep (recommended)
    9:00 PM4 cycles · 6 h of sleep
    10:30 PM3 cycles · 4.5 h of sleep

    Most adults need 7–9 hours. Use the sleep calculator for other wake-up times.

    3:15 AM at a glance

    24-hour time03:15
    Military time0315 hours
    15 minutes earlier3:00 AM
    15 minutes later3:30 AM

    Set an alarm for another time

    AM

    12:00 AM12:15 AM12:30 AM12:45 AM1:00 AM1:15 AM1:30 AM1:45 AM2:00 AM2:15 AM2:30 AM2:45 AM3:00 AM3:15 AM3:30 AM3:45 AM4:00 AM4:15 AM4:30 AM4:45 AM5:00 AM5:15 AM5:30 AM5:45 AM6:00 AM6:15 AM6:30 AM6:45 AM7:00 AM7:15 AM7:30 AM7:45 AM8:00 AM8:15 AM8:30 AM8:45 AM9:00 AM9:15 AM9:30 AM9:45 AM10:00 AM10:15 AM10:30 AM10:45 AM11:00 AM11:15 AM11:30 AM11:45 AM

    PM

    12:00 PM12:15 PM12:30 PM12:45 PM1:00 PM1:15 PM1:30 PM1:45 PM2:00 PM2:15 PM2:30 PM2:45 PM3:00 PM3:15 PM3:30 PM3:45 PM4:00 PM4:15 PM4:30 PM4:45 PM5:00 PM5:15 PM5:30 PM5:45 PM6:00 PM6:15 PM6:30 PM6:45 PM7:00 PM7:15 PM7:30 PM7:45 PM8:00 PM8:15 PM8:30 PM8:45 PM9:00 PM9:15 PM9:30 PM9:45 PM10:00 PM10:15 PM10:30 PM10:45 PM11:00 PM11:15 PM11:30 PM11:45 PM

    3:15 AM alarm FAQ

    How do I set an alarm for 3:15 AM?
    Press Set alarm for 3:15 AM above. The alarm is saved in your browser and rings at the next 3:15 AM while this tab stays open.
    What is 3:15 AM in 24-hour or military time?
    3:15 AM is 03:15 in 24-hour time, or 0315 hours in military time.
    Will the 3:15 AM alarm ring if my computer goes to sleep?
    No — a sleeping or powered-off device can't play sound. Keep the device awake and plugged in, the tab open, and the volume up. For critical wake-ups, set a phone alarm as a backup.
    Can I set more than one alarm?
    Yes. Add as many alarms as you like below, each with its own label, and toggle them on or off individually.