Why does fifteen minutes work on a task being avoided?

Because the commitment is small enough to accept and the end is defined before you start. Avoidance is usually about the open-ended size of a job rather than its difficulty, so putting a boundary around it removes the part being avoided. Whether the work carries on after the tone is then a separate decision, made from inside the task.

How does fifteen minutes compare with a twenty-five-minute work block?

Twenty-five is the familiar timeboxing length and suits work that needs a run-up before it becomes productive. Fifteen is better for starting, for tasks with a clear stopping point, and for anyone whose attention gives out before the longer block does. Two fifteens with a gap between them is not the same thing as one thirty-minute stretch.

Will it still be running when I unlock my phone?

The remaining time will be right, because it is recalculated from the moment you started rather than counted while the screen was off. A locked phone can suspend the page altogether, though, so the tone may arrive late or not at all. If the alarm is doing real work, keep the screen awake.

15 Minute Timer

← All preset timers

The quarter hour is a unit people already think in. Clocks are quartered, school periods break on it, and calendar software snaps appointments to fifteen-minute increments, so the number arrives with a shape already attached to it. That makes it the default block for work being avoided: short enough to agree to, long enough that something real happens inside it. It is also a common checkpoint partway through a longer bake, and the length of the standing meeting, which runs a quarter hour because that is roughly how long a room of people will stay on their feet.

15 Minute Timer Idle

00:15:00

HH : MM : SS

Hours

Min

Sec

Notify me when it's done

Ends with an audible alarm — keep this tab's sound unmuted. A running countdown keeps counting in a background tab and picks itself back up if you reload.

Open this page with the timer already running → — handy as a bookmark, though your device only lets a page make a sound after you have tapped it at least once.

Why 15 minutes

Domestically the same block covers a kitchen reset or a room that has drifted, and it behaves differently from the shorter settings in one respect. At fifteen minutes people stop watching the countdown, which is the point of setting one, but it also means the alarm has to carry from another room. Volume is worth checking here in a way it never is at thirty seconds.

What people set it for

A quarter-hour tidying block
A short study interval
A fifteen-minute standing meeting
Checking on an oven bake
Timeboxing a task being avoided
A break between school periods

FAQ

Why does fifteen minutes work on a task being avoided?: Because the commitment is small enough to accept and the end is defined before you start. Avoidance is usually about the open-ended size of a job rather than its difficulty, so putting a boundary around it removes the part being avoided. Whether the work carries on after the tone is then a separate decision, made from inside the task.
How does fifteen minutes compare with a twenty-five-minute work block?: Twenty-five is the familiar timeboxing length and suits work that needs a run-up before it becomes productive. Fifteen is better for starting, for tasks with a clear stopping point, and for anyone whose attention gives out before the longer block does. Two fifteens with a gap between them is not the same thing as one thirty-minute stretch.
Will it still be running when I unlock my phone?: The remaining time will be right, because it is recalculated from the moment you started rather than counted while the screen was off. A locked phone can suspend the page altogether, though, so the tone may arrive late or not at all. If the alarm is doing real work, keep the screen awake.

15 Minute Timer

Why 15 minutes

What people set it for

FAQ

Other preset timers