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minute·timer

Countdown · 25 minutes

25 minute timer

Twenty-five minutes: one Pomodoro, one block of work, one countdown.

25 minutes

25:00

Shortcuts: space start or pause · R reset · F fullscreen. The alarm rings even if you switch tabs.

In short

A 25 minute timer counts down from 25:00 to zero and sounds an alarm — 1500 seconds in total. This page opens with 25:00 already loaded, so pressing start is the only step, and the length can be changed to anything else without leaving the page. A 25 minute countdown is most often used for one Pomodoro work interval, revision blocks, and focused practice.

Length
25 minutes
In seconds
1,500 seconds
Ends with
Three rising alarm tones, plus vibration on mobile
Also known as
One pomodoro timer
Cost
Free, no account, no install

How to use the 25 minute timer

  1. Press Start. The 25 minute countdown begins immediately — there is nothing to set up first.
  2. Want a different length? Type into the minutes and seconds boxes, then press Start.
  3. Press Fullscreen to fill the screen with the digits, which is what you want across a room.
  4. Leave the tab open and carry on working. The tab title counts down, and the alarm still sounds.

What people time for 25 minutes

Twenty-five minutes is famous for one reason — it is the length of a single Pomodoro, the work interval at the centre of the technique Francesco Cirillo named after a tomato-shaped kitchen timer.

  • One focused work interval, phone away, notifications off
  • Revision blocks that end before attention fades
  • Deep cleaning one room properly
  • Practice sessions for an instrument or a language
  • Timed drafting, where the goal is words on the page rather than good words

The rule that makes it work is not the length, it is the ending: when the alarm rings, you stop, even mid-sentence. That is what makes the next block easy to start. If you want the breaks chained on automatically, use the Pomodoro timer, which runs 25 and 5 in sequence and gives you a longer break after four rounds.

Change the length without leaving the page

The minutes and seconds boxes above accept any duration — this page simply opens with 25 minutes already loaded. If another length is the one you reach for, the pages below open pre-set and can be bookmarked.

Questions about the 25 minute timer

Why 25 minutes and not 30?

Cirillo picked an interval short enough that starting never feels heavy, and long enough to get into the work. Twenty-five leaves a clean half hour once the five minute break is added, which is why it sits so neatly in a calendar.

How accurate is it?

Accurate to a fraction of a second over an hour. There is no rounding and no accumulated error, because each update recalculates the time left from scratch rather than subtracting from the last figure.

Will it stay free?

There is no paid tier to upgrade to and nothing gated behind an account, so there is nothing to start charging for.

What does the alarm sound like?

Three rising tones lasting about two seconds, generated by the browser rather than played from an audio file, so there is nothing to download and no delay before it sounds.