Study Break Ratio
Time actually spent working
3 hr 20 min
83% of the 4 hr you have
- Whole blocks of work8
- Breaks taken between them7
- Time spent on breaks35 min
- Time left at the end5 min
The same stretch under each published ratio
- Cirillo, 25 and 53 hr 20 min working
- DeskTime 2014, 52 and 172 hr 36 min working
- DeskTime 2021, 112 and 261 hr 52 min working
- Your own setting3 hr 20 min working
- 25 and 5 — Francesco Cirillo, The Pomodoro Technique (2006; Currency, 2018). One person’s working convention, adopted widely.
- 52 and 17 — DeskTime blog analysis of its own users, 2014. A software company’s telemetry, not a peer-reviewed study.
- 112 and 26 — DeskTime blog analysis repeated in 2021. The same method, seven years later, more than twice as long.
Notice how far apart those figures are. Cirillo’s 25 and 5 and DeskTime’s 112 and 26 are both widely repeated, and they disagree about the length of a working block by a factor of more than four. DeskTime’s own numbers moved from 52 and 17 in 2014 to 112 and 26 in 2021 using the same method on the same product, which is the clearest available evidence that none of this is a constant.
The arithmetic assumes breaks fall between blocks and not after the last one, because an evening ends when the work stops rather than when a final break finishes. That is why four 25-minute blocks fit into two hours on a 25 and 5 setting: 100 minutes of work and only three breaks, not four.
Read the comparison without over-reading it
Total working minutes is the one thing this page measures, and it is worth saying before the numbers appear that it is not the same thing as work done. A pattern that produces fewer minutes but leaves you willing to sit down again tomorrow beats one that maximises the column and burns the week. Equally, a pattern that fits your timetable — a lecture at eight, a bus at ten — beats a theoretically superior one that you have to abandon halfway.
What the numbers are genuinely good for is catching patterns that waste time structurally. A rest almost as long as the block, or a block so long that only one fits, shows up immediately as a poor total, and that much the arithmetic really can tell you.
What a ratio actually costs across one evening
Give the tool a stretch of time and a work-to-rest pattern and it reports how many whole blocks of work fit inside it, how many minutes of that stretch you end up genuinely working, how much goes on rest, and what is left over at the end. The same four hours produce noticeably different totals depending on the pattern, and seeing the difference as a number is more useful than arguing about which pattern is best.
Three published patterns that contradict one another
All three are offered here with their provenance attached, and none is marked as correct.
| Pattern | Published by | Year |
|---|---|---|
| 25 and 5 | Francesco Cirillo’s convention, set out in his book and reissued by Currency | 2006, reissued 2018 |
| 52 and 17 | A post on the blog of DeskTime, a time-tracking company, drawn from the usage logs of roughly thirty-six thousand of its own customers | 2014 |
| 112 and 26 | DeskTime again — same company, same instrument, same question | 2021 |
The third row is the interesting one. When DeskTime repeated the exercise, its most productive tenth were working for a hundred and twelve minutes and resting for twenty-six: an answer more than twice as long as the one the same method had produced seven years earlier. A quantity that doubles in that span is describing a particular group of people at a particular moment rather than anything fixed about attention.
The arithmetic, including the break that does not happen
Blocks of work are separated by rests, so a session of four blocks contains three of them and not four: an evening finishes when you stop working, not after a final rest nobody sits through. That single detail is why the answer is not a plain division. The number of blocks that fit is the available time plus one rest, divided by one work-and-rest cycle, rounded down — and dividing by the cycle alone silently costs you a block on almost every input.
Four hours on a twenty-five and five pattern therefore holds eight blocks: two hundred minutes of work, thirty-five minutes of rest and five minutes spare at the end. The same four hours on fifty-two and seventeen hold only three blocks, and the working total falls to a hundred and fifty-six minutes. Three quarters of an hour separates two patterns that are both routinely described as the efficient way to study.
Pomodoros, blog data and leftover minutes
Is the fifty-two and seventeen figure a scientific finding?
No. It is an analysis a software company published on its own blog, drawn from how long its customers had an application marked as productive in the foreground. It was never peer reviewed, it measures software usage rather than thinking, and the same company later reported a very different figure.
Why does the leftover time never disappear entirely?
Because only whole blocks are counted. A remainder shorter than one full block cannot become a block, so it is reported as time left over rather than quietly padded onto the last stretch of work and counted as focus that did not happen.
Which ratio gives the most working minutes?
Longer blocks with proportionally shorter rests always win on that column alone, and taken to its limit the maximum is no rest at all. That is exactly why the column should be read alongside whether you can actually sustain the pattern, rather than treated as a score to optimise.
Should the rest scale with the length of the block?
The three published patterns all keep roughly one part rest to three or five parts work, which is a description of what those particular people did rather than a rule anyone established. Setting your own two numbers and watching the totals is more informative than adopting somebody else’s proportion.
Last reviewed 27 August 2026