Set Alarm for 1:45 AM
A free online alarm clock preset to 1:45 AM. Press Start, leave this tab open, and it will ring at 1:45 AM sharp.
Keep this tab open. For alarms that work with your phone locked, get AVA.
Waking up at 1:45 AM
An alarm at 1:45 AM rarely means a normal morning — this is the territory of red-eye flights, split shifts, international calls, maintenance windows, and parents timing a feed. Odd-hour alarms need to be louder and more deliberate than everyday ones.
If this ring ends your main sleep, the math is the same as anyone’s morning: asleep by 6:15 PM gives you five full 90-minute cycles, 4:45 PM a complete nine hours. If it interrupts sleep instead, plan the return trip — protect the second half of the night as carefully as the first.
Waking in the dark is hard on the body, so stack the deck: volume up, phone across the room, one bright light within reach. And if you need to fall back asleep afterwards, keep the lights dim and the screens away — brightness now costs you sleep later.
FAQ
- How do I set an alarm for 1:45 AM?
- Press Start above — the page counts down to the next 1:45 AM and plays a loud beep through your browser. Keep this tab open and your volume up. No download or signup needed.
- What time should I go to bed to wake up at 1:45 AM?
- To get 7.5 hours of sleep (five full 90-minute cycles), be asleep by 6:15 PM. For a full nine hours, aim for 4:45 PM. Add about 15 minutes for actually falling asleep.
- Will the alarm ring if my screen is off or the tab is closed?
- No — a browser alarm needs this tab open and the device awake. For alarms that ring reliably even over the lock screen, use the AVA app.