radialtimers.com
Twenty minutes is the classic power nap, ending before deep sleep can begin so you wake without grogginess. The room stays silent until the double chime, and if you peek before drifting off, each of the twenty rings stands for one minute left.
A short nap is meant to end before you drop into deep sleep, because waking from deep sleep leaves the groggy, heavy feeling that can undo the nap's benefit. Twenty minutes is the usual target for this: enough to rest, short enough to wake from lightly. This page is twenty silent minutes ending on a clear double chime, with one ring per minute, so if you check before drifting off, the rings are the minutes left.
| Plan | Length | When |
|---|---|---|
| Power nap | 20 minutes, this page | Early afternoon, after lunch |
| Coffee nap | 20 minutes, coffee first | Before a long drive or a late shift; the caffeine arrives as you wake |
| Full cycle | 90 minutes | After a bad night, when there is time for a whole sleep cycle |
The 30 to 60 minute range is the awkward middle: long enough to reach deeper sleep, not long enough to complete a cycle, so it is the one most likely to leave you foggy. If twenty is too short and ninety too long, the 25 minute timer adds a small allowance for falling asleep.
People new to napping often lie awake for ten minutes and feel it was wasted. It was not; resting with eyes closed still counts, and the falling-asleep time shortens with practice. If it is consistently long, set the timer to 25 or 30 and keep the wake-up fixed rather than restarting the clock when you finally drift.
The guide on how long things really take has more on sleep and rest lengths, and the 10 minute timer covers the eyes-closed rest that is not quite a nap.
It is a clear double chime after twenty silent minutes, and the contrast does the waking. Set your volume before you lie down.
Yes. The countdown follows the clock, so it stays on time in a background tab and the chime still sounds at zero.
Add it as a browser source in OBS; the background stays transparent. Change t for any length.
A radial timer is a free online countdown timer you set in one click: pick a length, press Start, and an alarm sounds at zero. Run several timers at once, take one fullscreen, or pop one out picture-in-picture to float over other apps. Every timer keeps counting in a background tab, and any timer exports as a video. No download, no sign-up.
Its dial draws the countdown as 20 concentric rings, one for each twentieth of the duration. Rings empty one by one, outermost first, so a glance shows how far along you are without reading a digit.
Yes. The countdown follows the clock, so it stays on time while you work in another tab and still chimes at zero. The picture-in-picture popout keeps a small dial in view the whole way.
Yes. Any timer exports as an MP4 or a transparent WebM of the whole countdown, up to 4K and 60 fps, in 16:9, vertical, or square.
Yes. In OBS, add a browser source pointing at radialtimers.com/overlay?t=25m and a transparent dial counts down over your scene. Change t for any length, like 90s or 3h.
As many as you need. Each timer gets its own dial and runs on its own, which suits interval workouts, several dishes on the stove, or a room of activity stations.