Is a 30-minute nap good?
A 30-minute nap leaves you possibly a little groggy from deep sleep. Tap “Nap now” below to get the exact alarm time, including ~15 minutes to fall asleep.
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What a 30-minute nap does
A 30-minute nap is long enough to drop you into deep slow-wave sleep but too short to finish a full cycle. Being woken mid-deep-sleep causes sleep inertia — that heavy, groggy feeling that can last 15-30 minutes. If you have the time, a 20-minute power nap or a full 90-minute cycle usually leaves you feeling better.
Nap length cheat sheet
| Nap length | Best for | Wake-up feel |
|---|---|---|
| 10–20 min | Quick alertness, focus | Refreshed, no grogginess |
| 30 min | Generally avoid | Some grogginess |
| 60 min | Remembering facts & places | Possible deep-sleep grogginess |
| 90 min | Full cycle, creativity, REM | Refreshed |
General guidance only, not medical advice.
Related
Nap calculator · 20-minute nap · 90-minute nap · If I go to sleep now · Full sleep calculator