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Pomodoro Session Calculator

Split your task into pomodoros.

How it is calculated

The task length is cut into pomodoros of the chosen length, always rounding up so the whole task fits. There is a break between pomodoros but none after the last one, and every fourth break is a long one.

sessions = ⌈task ÷ pomodoro⌉, long breaks = ⌊(sessions − 1) ÷ 4⌋, short breaks = sessions − 1 − long breaks

total = sessions × pomodoro + short breaks × short + long breaks × long

All values are in minutes, and the total is printed as a whole number of minutes. Task length and pomodoro length must be above zero; break lengths can be zero but not negative. Every pomodoro is counted at full length, including a last partial one. For example, 8 sessions with 25/5/15 minutes give 1 long break and 6 short breaks, so the total is 245 minutes.

Worked example

A task of 140 minutes with 25-minute pomodoros, 5-minute short breaks and 15-minute long breaks. Sessions: 140 ÷ 25 = 5.6, rounded up to 6. Breaks happen between sessions, so there are 5 of them: ⌊5 ÷ 4⌋ = 1 long and 4 short. Total: 6 × 25 + 4 × 5 + 1 × 15 = 150 + 20 + 15, which is 185 minutes, or 3 h 5 min. The last session covers only 15 minutes of real work, but it is counted as a full pomodoro.

Try this example →

Common mistakes

  • Entering the task length in hours. The field is in minutes, so 2.5 hours must be typed as 150; typing 2.5 gives a single 25-minute session.
  • Expecting the session count to be rounded to the nearest number. It always rounds up, so 5.1 becomes 6.
  • Expecting a break after the final pomodoro. The total ends with the last work block, so it contains no closing break, even after a fourth or eighth session.
  • Putting the total time with breaks into the task length field. The task length is the focused work only, so the breaks are added on top.
  • Entering a pomodoro length that does not match your real timer. The session count and total change with it, since a 50-minute block needs fewer sessions than a 25-minute one.

About this calculator

The Pomodoro Technique, created by Francesco Cirillo in the late 1980s and named after the tomato-shaped kitchen timer he used as a student, structures work into fixed 25-minute focused intervals called “pomodoros,” each followed by a 5-minute break, with a longer 15-to-30-minute break inserted after every fourth pomodoro to prevent mental fatigue from accumulating.

Students, writers, developers, and other knowledge workers use this rhythm to combat procrastination and task-switching fatigue, because committing to a short, bounded interval lowers the psychological barrier to starting a task and the scheduled breaks prevent the burnout that comes from working in undefined, open-ended stretches.

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