A quarter of an hour is the natural unit of the working day — the length of a stand-up, a coffee break or a focused burst. This 15 minute timer starts immediately.
Fifteen minutes maps neatly onto how calendars are structured, which is why it dominates meeting culture. It is also the longest nap you can take without entering deep sleep, making it the safest quick-recharge length.
A quarter of an hour is four blocks per hour and 96 per day — the smallest unit most calendars will even schedule. It is enough for a full room tidy, a short nap that leaves no grogginess, about 1,200 steps of walking, or a first draft of a short email newsletter.
Useful when a recipe, workout plan or exam paper states the time differently:
| 15 minutes in… | Value |
|---|---|
| Seconds | 900 |
| Minutes | 15 |
| Hours (decimal) | 0.2500 |
| Fraction of an hour | 1/4 of an hour |
| How many fit in an hour | 4 |
| How many fit in a day | 96 |
The countdown above is already running. When it reaches zero VClock plays your chosen alarm, flashes the display and updates the browser tab title, so you will notice even if you have moved to another window. Press Stop Alarm to silence it or Reset to run the same 15 minutes again.
You can change the alarm sound at any point before or during the countdown — Beep, Digital, Alarm Bell, Chime, Siren and Soft Wake are all available, and each plays a short preview when selected. To use a different length, press Reset and type any duration, or pick one from the main timer page.
Need something else? Try a little shorter with the 12 minute timer or a little longer with the 20 minute timer. For a round comparison, double it and you get the 30 minute timer.
Yes — 15 minutes keeps you in light sleep, so you wake refreshed rather than groggy. If you routinely need longer, see our guide on how long a power nap should be.
The limit is the point. A hard fifteen-minute cap forces updates to stay factual and pushes discussion into separate conversations, which is exactly what the format is designed to do.
Yes — the countdown begins as soon as the page loads, so there is nothing to press. If you would rather start it yourself, press Reset and then Start.
Yes. Pause holds the remaining time exactly where it is; Resume continues from that point and Reset returns the clock to the full 15 minutes.
VClock plays your selected alarm sound on a loop, flashes the display and changes the browser tab title. Press Stop Alarm to silence it.
Completely. There is no sign-up, no download, no daily limit and no watermark — set it as many times as you like.
Switch to the VClock alarm clock to ring at a specific hour instead of counting down.
Open the Alarm Clock