Wake times
If your alarm is set for 5:30am, when should you go to bed?
Somewhere around half past five is where an early alarm stops being a project and starts being a routine. The bedtime it asks for is late enough to have an evening, and early enough that seven and a half hours is not a fantasy.
In short
To wake up at 5:30am feeling like you finished a cycle rather than got cut off inside one, go to bed at 9:45pm. That is 7h 30m of sleep across 5 full cycles, plus the fifteen minutes it takes most people to drop off. If you can get to bed at 8:15pm you get 9h, and 11:15pm still leaves you 6h.
- Lights out for a full night
- 9:45pmLights out for a full night5 cycles, 7h 30m asleep
- Length of an average sleep cycle
- 90 minLength of an average sleep cycleReal ones run 70 to 120
- Added for falling asleep
- 0h 15mAdded for falling asleepMost calculators forget this
| Cycles | Lights out | Time asleep | What it is good for |
|---|---|---|---|
| 6 | 8:15pm | 9h | A long night. Worth aiming at if you are paying back sleep debt or training hard. |
| 5 | 9:45pmAim here | 7h 30m | The target most adults should hold on a normal week. |
| 4 | 11:15pm | 6h | Short, but a whole number of cycles, so you surface from a lighter patch. |
| 3 | 12:45am | 4h 30m | An emergency night. Fine occasionally, damaging as a pattern. |
This is the earliest alarm with a normal evening attached
A 9:45pm bedtime is unusual but it is not antisocial. You can eat dinner, see the people you live with, and still be in bed in time for five full cycles. Push the alarm to 5:00 and that bedtime moves to 9:15, which starts cutting into the only part of the day that was yours.
The people who hold a 5:30 alarm for years are usually training before work, or have a commute that starts before seven, or have small children and have worked out that the hour before the house wakes up is the only quiet one available.
- Five cycles: bed at 9:45pm
- Six cycles: bed at 8:15pm
- Four cycles: bed at 11:15pm, fine occasionally, not fine as a pattern
Light in the first hour does more than caffeine
Getting light into your eyes soon after a 5:30 wake up is what tells your body clock that this is now morning. In summer that is easy. From October to March it means turning lights on properly rather than moving around a dim house, and if you can get outside before eight, better still.
Coffee works, but it works on the sleepiness rather than on the clock. Light moves the clock, which is why a week of bright mornings makes the alarm easier and a week of dark ones makes it harder, regardless of how much you drank.
The table is an average, and your night is not
Ninety minutes is the number everyone quotes because it is the mean. In a real night your first cycle tends to run short, the middle ones stretch, and by the last hour before 5:30amyou are cycling faster and spending more of it in light sleep and REM. So the table gets you to roughly the right bedtime, and then the last half hour is a coin toss.
That last half hour is the entire argument for a smart alarm. Tock watches the thirty minutes before 5:30am on two channels, movement from the accelerometer and sound from the microphone, and rings a little early if it finds a lighter moment. If it does not find one,5:30am rings exactly as you set it. You can read more inhow smart wake works, or start withsleep cycles explained if the arithmetic above is the part you want to understand properly.
Questions people ask
What time should I go to bed to wake up at 5:30am?
For five cycles, 9:45pm. That is seven and three quarter hours from lights out to alarm, including about fifteen minutes to fall asleep. For six cycles, 8:15pm.
Is 5:30am a good time to wake up?
For a lot of people it is the sweet spot: early enough for a genuinely quiet hour, late enough that the bedtime is achievable. Whether it suits you depends more on your chronotype than on the merits of the hour, and a late chronotype will find it a fight all year round.
How do I stop hitting snooze at 5:30am?
Snooze works because dismissing an alarm takes one thumb and no thought. Tock keeps ringing until you solve something, which is nine different tasks including scanning a barcode in another room or photographing a spot you saved. It is harder to argue with a task than with a button.
Other wake times
The same maths, run for a different alarm.
- Waking up at 4:00amBedtimes by sleep cycle for a 4:00am alarm.
- Waking up at 4:30amBedtimes by sleep cycle for a 4:30am alarm.
- Waking up at 5:00amBedtimes by sleep cycle for a 5:00am alarm.
- Waking up at 6:00amBedtimes by sleep cycle for a 6:00am alarm.
- Waking up at 6:30amBedtimes by sleep cycle for a 6:30am alarm.
- Waking up at 7:00amBedtimes by sleep cycle for a 7:00am alarm.
- Waking up at 7:30amBedtimes by sleep cycle for a 7:30am alarm.
- Waking up at 8:00amBedtimes by sleep cycle for a 8:00am alarm.
- Waking up at 8:30amBedtimes by sleep cycle for a 8:30am alarm.
- Waking up at 9:00amBedtimes by sleep cycle for a 9:00am alarm.
Elsewhere on the site
A different corner of the same problem.
- NapsThe 20 minute napA 20 minute nap is the standard recommendation because it produces a solid alertness benefit while ending before most people reach slow wave sleep, so you wake up clear rather than groggy. It is long enough to be worth the time and short enough to stay safe.
- Wake tonesMusic boxMusic box is Tock's slowest and most nostalgic wake tone, a thin bell-like melody that unwinds instead of alerting. It rings reliably through silent mode because Tock's alarms run on Apple's AlarmKit, but as a tone it is the weakest choice in the set for anyone who genuinely sleeps hard.
- Head to headCalm vs Headspace SleepIf you want to be told a story by a voice you recognise, Calm has the deeper and better-produced library. If you want to be taught a wind-down and nudged to keep at it, Headspace's course structure does more for you.
- FeaturesSleep coachThe sleep coach is a chat tab inside Tock that reads your recent nights before it answers. It can quote your score, play back a clip Tock recorded, and navigate the app to change a setting on your behalf. It needs a network connection.
- Sleep soundsCricketsA field of crickets is not one insect but dozens slightly out of phase with each other, and that stagger is what turns a repeating chirp into a steady high shimmer you can drift on. It lives almost entirely above 2 kHz, so it covers thin, sharp sounds well and does nothing whatsoever about traffic.
- Tock for youNight shift workersYou finish at 7am and try to sleep while the sun is up, the neighbours are drilling and your phone is on silent so nothing wakes you. Then you have to get up on time anyway, in the middle of what your body still thinks is the afternoon.
An alarm at 5:30am does not have to feel like 5:30am
Tock watches the half hour before your alarm and rings a little early if it finds a lighter moment. Your set time is always the fallback, so you are never late.