TimerPlan30 Seconds timer
30 Seconds timer
0:00
Ends at —
Space starts and pauses · R resets
One thing a month worth timing
MonthlyOne thing a month worth measuring or capping with a clock — a payroll trap, a nap length, a meeting that never gets added up. Two sentences and the tool.
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What is a 30 seconds timer?
The Timerdial 30 seconds timer is a full countdown already set to 30 seconds: press start and it rings, keeps the screen awake, and shows the time left in the tab title. Thirty seconds is the interval people set most often below a minute, and the reason is that it is the shortest stretch that feels deliberate. It is a full plank for a beginner, a proper stretch hold, and the rest between sets in a circuit.
In other units that is 0:30 on a clock, 0.5 minutes, and 0.008333 of an hour, so 120 of them fit into an hour and 2880 into a day.
Because the finish is stored as an absolute clock time rather than counted in ticks, the countdown is exact after a spell in a background tab, and the alarm is booked into the audio clock the moment you press start — which is what lets it sound while the tab is frozen.
Press start, or press it after changing the length — this page is the ordinary timer with 30 seconds already in the box.
What people set 30 seconds for
a plank, a stretch held properly, resting between sets, an elevator pitch, a French press bloom. Thirty seconds is the interval people set most often below a minute, and the reason is that it is the shortest stretch that feels deliberate. It is a full plank for a beginner, a proper stretch hold, and the rest between sets in a circuit.
| In this unit | 30 seconds is |
|---|---|
| Seconds | %!d(float64=30) |
| Minutes | 0.5 |
| Hours | 0.008333 |
| On a clock | 0:30 |
| Written for the box | %!d(float64=30)s |
| Fits into an hour | 120 times |
| Fits into a day | 2880 times |
The address bar carries the length, so bookmarking this page keeps it, and adding ?auto=1 to the link starts the countdown as soon as it opens — useful on a shared screen where a click is one thing too many.
Next to it
Shorter: 20 seconds. Longer: 45 seconds.
Every length is listed on the timer by duration page. For a different kind of countdown, the countdown timer counts to a time of day instead of for a length, the kitchen timer runs several at once, and the pomodoro timer repeats work and break. To count upward instead, use the stopwatch.
Frequently asked questions
How long should a stretch be held?
Thirty seconds is the figure most physiotherapy guidance settles on for a static stretch, repeated two to four times. Under fifteen seconds does very little; beyond about a minute the extra time adds less than another repetition would.
How many seconds is 30 seconds?
%!d(float64=30) seconds, which is 0:30 on a clock and 0.5 minutes as a decimal. The timer accepts every one of those forms in its box — %!d(float64=30)s, %!d(float64=30), 0:30 — and they all set the same countdown.
Will a 30 seconds timer still ring if I switch tabs?
Yes. The alarm is scheduled into the audio clock at the moment you press start, so it sounds at the right time even if the tab has been frozen in the background since — unlike a page that only tries to make a sound once the time is up, by which point a throttled tab has already missed it. The remaining time is also written into the tab title and drawn into the tab icon, so you can read it without switching back.
How this works
Sources:
Reading a 30 seconds countdown
It is the same engine as every timer here. Absolute finish time, scheduled alarm, screen held awake — the only difference is that 30 seconds is already in the box.
The tab title carries it. So this page does not have to be the one you are looking at.
Nothing is stored. The length lives in the address bar, which is what makes a bookmark work.