How to Use a Pomodoro Timer: 25/5, 52/17, 90-Minute Blocks and Timeboxing

A Pomodoro timer is an ordinary countdown set to 25 minutes. The technique is the habit around it: one task, no switching until the alarm, then a short break. Any timer can run it, including the Timelive timer.

Where the Pomodoro Technique comes from#

Francesco Cirillo says he created the technique in the 1980s, with a tomato-shaped kitchen timer, while he was a university student who struggled to concentrate. Cirillo dates it to the 1980s; many other accounts say the late 1980s, so sources differ slightly.

Pomodoro is the Italian word for tomato, and each 25-minute interval is called a pomodoro. Cirillo's short introduction on Atlassian's blog breaks the basic unit of work into five steps, from choosing a task to a longer break after every four pomodoros.

The routine, step by step#

1. Choose one task and write it down. "Draft the introduction" works better than "work on the report".
2. Set a timer for 25 minutes and start it.
3. Work on that task only until the alarm rings.
4. Take a break of about 5 minutes. Some descriptions say 3 to 5. Stand up and look away from the screen.
5. Repeat. After four pomodoros, take a longer break. Descriptions usually give 15 to 30 minutes.

A pomodoro is meant to be indivisible. Descriptions of the method say that if something interrupts you and cannot wait, that pomodoro does not count and you start a fresh one. If the interruption can wait, the shorthand is inform, negotiate, schedule, call back: say you are in the middle of something, agree on a later time, put it in your calendar and follow up after the alarm.

Here is one round starting at 9:00 a.m., with the times worked out:

Four pomodoros and three short breaks fill 115 minutes. With a long break of 15 to 30 minutes, a full round takes 130 to 145 minutes. In an eight-hour day with nothing else in it, that fits roughly 13 pomodoros with 30-minute long breaks or 15 with 15-minute long breaks.

Other intervals: 50/10, 52/17 and 90 minutes#

The table compares four patterns. Cycle length and break share are our arithmetic. For the 90-minute row we found no source giving a tested break length, so we use 20 minutes purely for illustration; the cycle and share change if you pick a different break.

The 52/17 rule is the easiest to misread. DeskTime, a company that sells time-tracking software, ranked its users by the share of their time spent in apps and websites it labels productive. It took the top 10% and reported that they worked about 52 minutes and then rested about 17. The company says a later repeat found 112 minutes of work and 26 of rest, and links the change to remote work. These are averages from one vendor's users, describing how already-productive people worked. They do not show that copying the pattern makes anyone more productive.

The 90-minute block borrows from the basic rest-activity cycle, Kleitman's hypothesis that alertness rises and falls in an ultradian rhythm (one shorter than a day) of roughly 90 minutes. The idea grew out of sleep research, and the overview gives the range as 80 to 120 minutes. A small study of 10 male university students reported rhythms in task performance during the day, but researchers have disagreed since at least 1977 about whether one such cycle exists outside sleep. We found no study that tests a 90-minute work block against other schedules.

What the research does and does not show#

The best comparison of 25/5 that we found is a 2025 study from Maastricht University in the journal Behavioral Sciences. It gave 94 university students a two-hour online study session with one of three break styles: breaks they timed themselves (25 students), 5 minutes after every 25 minutes of studying (36), or Flowtime, where students chose when to stop and the break length depended on how long they had worked (33).

Compared with the self-timed group, fatigue rose faster in the Pomodoro group, and motivation fell faster in both the Pomodoro and Flowtime groups. Overall fatigue and motivation did not differ significantly between the three, and neither did productivity, task completion or flow. So in this study the 25/5 split showed no edge over breaks students timed themselves.

That is one two-hour session with students, so it says little about weeks of work at a desk. One study cannot separate the method from the benefit of simply planning and starting, and we did not find other controlled comparisons of 25/5 against other break schedules. Supporters argue that a fixed, short interval makes a big task feel manageable: a reasonable case for trying it, not proof that it beats other schedules.

Timeboxing and other uses of a timer#

Timeboxing means deciding in advance how much time a task or meeting gets, and stopping or choosing what to do when that time is up. A pomodoro is a timebox of fixed size; in general the box can fit the job.

• Tasks. Give an overflowing inbox 25 minutes instead of "until it is done". When the alarm rings, stop or start one more timer on purpose.
• Meetings. A 30-minute meeting at 10:00 with three agenda items boxed at 10, 15 and 5 minutes should finish them at 10:10, 10:25 and 10:30. How to Schedule a Meeting Across Time Zones: A 6-Step Checklist covers choosing the time, and the meeting planner lines up cities.
• Estimates. Time a task with the stopwatch first, then box it (How to Use a Stopwatch: Laps, Splits and How Accurate Hand Timing Is).
• Away from the desk. The same countdown times a recipe step, a rest between exercise sets, a practice run of a five-minute talk or a 10-minute tidy-up.

Running it on the Timelive timer#

1. Open the 25-minute timer and press Start (or Space).
2. While it runs, a ring shows the time left, a line below shows the clock time it will end (for example "Ends at 9:25 AM"), and the browser tab title shows the countdown.
3. When time is up, an alarm of four beeps repeats about every 1.6 seconds for up to a minute. Press Stop alarm or Escape to silence it. Untick Sound to go silent; the screen still flashes and the tab title says "Time's up".
4. Tap the 5 min preset and press Start for the break. For the long break, tap 15 or 30, or type your own minutes.
5. For 50 or 52 minutes, type the number in the Minutes box. For 90, open the 90-minute timer.

Some phones pause background tabs when the screen locks, so keep the tab in view and the volume up. The timer does not count pomodoros or move from work to break by itself.

When focus fails#

• Shrink the block. If 25 minutes feels impossible, try 10 and lengthen it as it gets easier.
• Park distractions. Keep a scrap of paper. Write down the stray thought or errand, go back to the task and deal with it in the break.
• Shrink the task. "Work on the report" gives you nothing to finish. "Write the first three paragraphs" does.
• Reset after a real interruption. If you stop for something that could not wait, reset and start again so the next pomodoro is a full one.

A timer provides structure. It cannot fix tiredness, noise or a task you do not understand. If trouble concentrating is persistent or worrying, a doctor can help in ways a timer cannot.

Frequently asked questions

Sources and further reading

1. Francesco Cirillo — The Pomodoro Technique (Francesco Cirillo's own site)
2. The Pomodoro Technique for better productivity — Atlassian blog (guest post by Francesco Cirillo)
3. Pomodoro Technique — Wikipedia
4. Does the 52-17 rule really hold up? — DeskTime blog
5. Investigating the Effectiveness of Self-Regulated, Pomodoro, and Flowtime Break-Taking Techniques Among Students — Behavioral Sciences (MDPI), via PubMed Central
6. Basic rest–activity cycle — Wikipedia
7. Ultradian rhythms in task performance, self-evaluation, and EEG activity — BISP-Surf literature database