Set an alarm for 10:00 AM

WakeUpBroo

iPhone alarm

No snooze button. You turn it off from your laptop, not from bed.

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What time to go to bed to wake up at 10:00 AM

Sleep runs in cycles of roughly 90 minutes, and waking at the end of one feels much easier than being pulled out of the middle. Counting back from 10:00 AM in whole cycles — plus about 15 minutes to fall asleep — gives these bedtimes:

How much sleep you get, by bedtime

The other direction: if you already know roughly when you go to bed, here's what a 10:00 AM alarm actually leaves you with.

These are averages, not rules — real cycles run anywhere from 80 to 110 minutes and shift through the night. Treat the times as good starting points, and if you consistently wake exhausted despite enough hours, that's worth raising with a doctor rather than a calculator.

A 9 or 10 a.m. alarm is usually the end of a late night

Set the tables aside for a second and be honest about which direction you got here from. Very few people choose a 9 or 10 a.m. wake-up from a 10 p.m. bedtime — if they did, they'd be waking up naturally long before the alarm. Far more often the alarm is late because the night was, and the whole schedule has quietly slid a few hours later than you intended.

That matters because the slide is self-reinforcing. Waking at 9 or 10 means you miss the morning light that anchors your body clock, so tonight you won't feel sleepy until later, so tomorrow's alarm sits even deeper in your night. Left alone, this band drifts later week by week — the alarm that felt fine in September is the one you sleep through in November. Getting outside within an hour of waking is the single cheapest brake on that drift.

The one genuinely good reason to be here is a schedule that actually starts late — night shifts, a late class, remote work across timezones. If that's you, the second table is the only check that matters: find your real bedtime and see what you're getting. Seven to nine hours means the timing is working for you. Twelve means you're repaying a debt from earlier in the week, and the fix is the bedtime, not the alarm.

If the alarm rings and you sleep through it

Setting the right time is the easy half. If you already sleep through alarms or turn them off without remembering, a browser tab with a Stop button is the easiest alarm in the world to defeat — one click, still horizontal.

The fix is separating the alarm from its off switch. WakeUpBroo rings on your iPhone with no snooze and no dismiss button; to stop it you read a rotating code from wakeupbroo.com/code on another device — the computer this page is open on, left across the room. By the time you've walked over and typed it, 10:00 AM has actually happened.

Other wake-up times

Need a slightly earlier start? Set an alarm for 9:30 AM. For any other time, use the online alarm clock or work backwards with the sleep calculator.