24-Second Timer

A 24-second timer is long enough for a scrub, plank or rest and short enough to repeat. The full-screen display makes the remaining seconds visible at a glance.

00:00

Tip: press Space to start or pause, R to reset, F for full screen.

In short

The 24-second timer is a free, full-screen countdown with an alarm, pause and loop. It is preset to 24 seconds (0:24) and ready in one click - Popular for interval training, plank & wall-sit and more.

Is a 24-Second Timer the Right Length?

Best for: intervals, holds and precise physical cues.

Choose another length for: open-ended work or anything that needs preparation.

Choose the 24-second timer when the finish matters more than checking progress continuously. Pick a shorter timer for urgency, or a longer one when stopping mid-task would be disruptive.

A Sample 24 Seconds Plan

StageTimeWhat to do
Prepare4 secondsChoose one outcome and remove distractions.
Main block16 secondsDo the task without checking another clock.
Finish4 secondsWrap up, save your place and decide the next step.

How to Set a Timer for 24 Seconds

Starting this countdown takes one click. The clock is already set to 0:24. Here is the full flow, including pausing, looping and full screen.

  1. Open the timerYou're already here. This page is preset to 24 seconds, so the countdown loads ready to go with 24 seconds on the clock.
  2. Press StartHit the big Start button (or the Space bar) to begin. The display fills the screen so you can read it from across the room.
  3. Keep workingSwitch tabs or minimise the window. The timer keeps counting in the background and remembers its place if you reload.
  4. Pause, loop or resetPause to grab a break and resume where you left off, switch on Loop to repeat automatically, or reset to run the 24-second countdown again.
  5. Get the alarmAt zero the screen flashes and the page attempts to play the selected sound. Keep the tab open and test audio before relying on it.

Duration and Clock Conversion

This duration spans 24 seconds in total.

That's under a minute - A short, precise countdown.

However you measure it, the 24-second countdown tracks the same span and reaches zero at the scheduled finish time. Alarm sound requires the page to remain open and the browser to permit audio.

Seconds24
Minutes0.4
Hours0.0067
Clock (h:mm:ss)0:00:24

Why This Length Can Work

24 seconds gives you a real challenge without the grind. It is the classic length for a wall sit, a burst of jumping jacks, or letting a face wash do its work. Grab a quick 30-second timer and push through.

Tip: Pick a target before you start 24 seconds, like a set number of squats. A goal turns a short burst into a mini challenge you want to beat.

Tasks That Fit the Available Time

A 24-second window can hold a focused, clearly bounded action. For the strategy behind it, our guide on interval training timer guide for hiit workouts goes deeper. Possible uses include:

  • scrub your hands properly
  • hold a solid wall-sit
  • steep a very quick green tea
  • rest between heavy sets

Use Cases for This Duration

This countdown is useful when its length matches the job. Consider these examples:

Interval training

Drive work-and-rest intervals for Tabata, HIIT and circuit sessions.

Plank & wall-sit

Hold an isometric exercise to the exact second and beat your best.

Breathing resets

Take a short, timed breathing break before a call, serve or set.

Hand washing

Scrub for the full recommended time - No guessing.

Espresso & quick brews

Pull a shot or steep a fast tea without over- or under-doing it.

Rest between reps

Keep short rest periods honest during heavy lifting.

Using this for training?

Interval Training Timer Guide for HIIT Workouts

Set up interval timers for HIIT, Tabata, EMOM and circuits. Learn the work/rest formats and how to loop a timer so your rounds run hands-free.

Read the guide →

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View all second timers →

Questions About This Duration

How is the remaining time calculated?
The countdown is driven by your device clock, so its display recalculates the remaining time whenever the browser is able to update. When the page is hidden the browser may slow the on-screen updates, but the finish time is calculated from the real clock. Background alarm sound is not guaranteed.
How is a short countdown calculated?
The timer saves a finish timestamp from your device clock and recalculates what remains on each update instead of assuming one callback per second.
Can I quickly repeat it for intervals?
Turn on Loop and the timer restarts automatically when it ends - Ideal for interval training, circuits and repeated rounds. You can also just press reset to run it again.
What happens when the timer reaches zero?
The screen flashes and the page attempts to play the selected alarm. You can silence it with one tap. An already loaded page can produce audio without a connection, but device and browser restrictions still apply.
Do I need to install anything or sign up?
No. The timer runs in any modern browser with nothing to install and no account to create. It works the same on a phone, tablet, laptop or desktop.
Where is my timer data stored?
Only on your own device. The countdown and its settings live in your browser's local storage and never reach our servers, so what you time stays entirely yours.

Need this countdown on another page? Create an embeddable timer with your preferred title, theme and size.