How to fall asleep when you're not tired: stop trying to force it. Dim the lights, do something calm and boring for 30 to 60 minutes, and only get into bed once you feel sleepy. If you're still awake after about 20 minutes, get up and repeat. Then, tomorrow, fix whatever left you wired tonight: a late nap, afternoon caffeine, a lie-in or a bedtime that's earlier than your body clock.
Lying in bed wide awake doesn't count as rest you're banking. It drags down your sleep efficiency, the share of time in bed you actually spend asleep, which you can check with the sleep efficiency calculator.
Free toolSleep Efficiency CalculatorWhat share of your time in bed you actually spend asleep.Why am I not tired at bedtime?
Usually because either your sleep pressure is low or your body clock isn't ready yet.
Sleep scientists describe two systems working together. One is sleep pressure: the longer you're awake, the stronger the drive to sleep, and sleep drains it. The other is your circadian clock, which sets the times of day you feel alert or sleepy. You fall asleep most easily when high pressure and the clock's sleepy phase line up.
Here's what typically knocks them out of line:
| Why you're not tired | What's happening | Fix for tomorrow |
|---|---|---|
| Afternoon or evening nap | Nap drained sleep pressure | Keep naps under 20 minutes and before mid-afternoon |
| Caffeine after lunch | Caffeine blocks the sleepy signal | Move your last coffee earlier |
| Slept in this morning | Less time awake, less pressure | Get up at your usual time |
| Bedtime earlier than usual | Clock isn't in its sleepy phase yet | Move bedtime 15 minutes at a time |
| Bright screens and lights late | Light pushes the clock later | Dim lights in the last hour |
| Stress or a racing mind | Alertness overrides sleepiness | Wind down and offload worries earlier |
Why does forcing yourself to sleep backfire?
Because effort and frustration raise alertness, which is the opposite of what sleep needs.
The more you try, check the clock and calculate how few hours are left, the more awake you get. Do that often enough and your brain starts to link your bed with being awake. That's why the standard advice for people who can't sleep is to stop trying in bed and get up instead. Is it bad to lie in bed awake? explains the 20-minute rule step by step.
How do you fall asleep when you're not tired?
Wait for sleepiness instead of chasing it, and make the wait as dull and dim as you can.
- Don't get into bed yet. Stay up in another room with a low lamp until your eyelids get heavy.
- Do something calm and a bit boring. A paper book, quiet music, folding laundry, gentle stretching. Avoid work, news and social media.
- Keep the lights low and screens dim. Bright light in the evening tells your clock it's still daytime.
- Go to bed when you feel sleepy, not when the clock says so.
- If you're awake after about 20 minutes, get up and go back to step 2. Don't watch the clock; go by feel.
- Get up at your normal time tomorrow no matter how the night went. That builds sleep pressure for the next night.
A short, steady wind-down every night helps too. Bedtime routine for adults has a simple template.
Will caffeine from this afternoon keep me awake tonight?
It might. An 8 oz coffee (about 95 mg) at 4 PM still leaves about 36 mg in your system at 11 PM, on an average 5-hour half-life.
| Coffee (95 mg) at | Caffeine left at 11 PM |
|---|---|
| 2 PM | about 27 mg |
| 4 PM | about 36 mg |
| 5 PM | about 41 mg |
In a controlled study, a large 400 mg dose of caffeine taken even 6 hours before bed cut total sleep by more than an hour compared with a placebo. Your own half-life may be shorter or longer than average. The caffeine calculator finds the latest time for each drink.
What if I napped today and now I'm not tired?
Stay up a little later tonight rather than going to bed early and lying awake, then skip or shorten tomorrow's nap.
A long or late nap is one of the most common reasons for a wide-awake bedtime. Going to bed 30 minutes later than usual and still getting up on time is usually better than an hour of tossing and turning. Can't sleep after a nap has the latest nap times for common bedtimes.
How to fall asleep earlier than usual
If you need an early night, say before a flight, don't expect to fall asleep two hours early on command. Your clock moves slowly.
- Get up earlier that morning and skip naps, so you have more sleep pressure by evening.
- Cut caffeine by late morning that day.
- Get bright light in the morning and dim light in the evening.
- Accept a slightly shorter night rather than lying awake for hours.
For shifting your schedule earlier for good, use the gradual plan in how to go to bed earlier.
When to see a doctor about trouble falling asleep
If you regularly can't fall asleep, at least three nights a week for several weeks, and it affects your days, talk to a doctor.
That pattern can be chronic insomnia. The American Academy of Sleep Medicine's guideline strongly recommends cognitive behavioral therapy for insomnia (CBT-I) for adults with chronic insomnia, and suggests stimulus control and sleep restriction as options on their own. It suggests against relying on sleep hygiene tips alone. Also see a doctor if you snore loudly, gasp or stop breathing in your sleep, or feel very sleepy during the day.