How long should a nap be?
Short naps are commonly suggested for a quick refresh, because you wake before sliding into deeper sleep. Longer naps can leave some people groggy, a feeling often called sleep inertia. These lengths are typical guides rather than rules, and everyone responds differently.
| Length | Typical use | Worth knowing |
|---|---|---|
| 10 minutes | A quick reset | Easy to wake from, and easy to fit into a break |
| 20 minutes | The classic power nap | A popular choice for an afternoon dip |
| 30 minutes | A longer rest | Some people wake feeling foggy |
| 90 minutes | A full sleep cycle, roughly | Often chosen when you are short on sleep and have time to spare |
Setting yourself up
- Pick a cool, quiet, dim spot. An eye mask and earplugs help if the room is bright or noisy.
- Put your phone on do-not-disturb, but keep the volume up on this timer so the alarm still reaches you.
- Lie flat or recline. Slumping in a chair can leave you with a stiff neck.
- Allow a few minutes to drift off. Some people start the timer when they lie down and add five minutes to their target.
Waking up well
Sleep inertia usually fades within a short time. Splash cold water on your face, open the curtains, drink some water and move around for a minute. Avoid hitting snooze, because dozing for five more minutes can drag you back into sleep without letting you finish a proper cycle.
The coffee nap idea
A frequently shared tip is the coffee nap: drink a cup of coffee, then nap for around 20 minutes, since caffeine takes a while to take effect and you wake just as it arrives. Opinions on how well it works vary, and people differ a lot in their caffeine sensitivity. If caffeine disrupts your night-time sleep, skip it, especially late in the day.
Naps and night-time sleep
For some people, long or late-day naps make it harder to fall asleep that night. If you notice this, try napping earlier in the afternoon or shortening the nap. A nap can top up your energy, but it is not a substitute for regular sleep at night.
Be sensible
Never nap somewhere unsafe. If you feel drowsy behind the wheel, pull over in a safe place rather than pushing on. And if you feel tired all the time despite getting enough sleep, a health professional is the right person to ask.
Want a different length? The 10-minute, 20-minute, 30-minute and 90-minute timers are ready made. If you are using naps to break up a long study day, the Pomodoro timer is a natural companion.
Questions
How long should a power nap be?
About 10 to 20 minutes is the length most commonly suggested for a power nap. It is long enough to feel refreshed for many people but short enough to avoid deeper sleep. Naps near 30 minutes can leave some people feeling groggy, so test what suits you.
What is sleep inertia?
Sleep inertia is the groggy, disoriented feeling some people have right after waking, especially from deeper sleep or a longer nap. It usually passes within a short time. Keeping naps brief, getting some light and moving around can help.
Is a 90 minute nap better than a 20 minute nap?
They do different jobs. A 20 minute nap is a quick refresher. A 90 minute nap roughly matches one full sleep cycle, so some people wake more naturally from it. Cycle length varies from person to person, and a longer nap can make it harder to sleep that night.
What is a coffee nap?
A coffee nap means drinking coffee quickly and then taking a short nap of about 20 minutes, so you wake as the caffeine starts to work. It is a commonly shared idea, though results vary and caffeine can disrupt sleep for sensitive people, particularly later in the day.