Everyone quotes 25 and 5, so people assume it’s prescribed. It isn’t. Cirillo picked 25 minutes because that’s where his kitchen timer happened to land, and the method survives changing it. The interval is a dial, and different work wants it set differently.
If the whole idea is new, the basics are here. Otherwise, the three presets worth knowing:
25 / 5 — the classic
Twenty-five minutes on, five off. This is the default for a reason: it’s short enough that starting never feels like a big commitment, and it fits stop-start work like email, admin, flashcards, and chores. The downside is that deep work barely gets going before the bell. For anything you need to sink into, it can feel like being interrupted on purpose.
50 / 10 — the workhorse
Fifty on, ten off. This is the one most people settle on once the novelty wears off. It’s long enough to get properly into writing, reading, or coding, and the ten-minute break is enough to actually reset. If you only ever learn one preset beyond the classic, learn this one.
90 / 15 — the deep block
Ninety on, fifteen off. Ninety minutes lines up roughly with the body’s natural cycle of rising and falling focus, which is why it suits one large task you can defend against interruption. It asks more of you up front, and it’s a bad fit for a day full of small obligations. Used on the right work, it’s the closest the technique gets to flow.
Match the interval to the task, not your ego
Longer is not more serious. Reaching for 90/15 because it sounds hardcore, then checking your phone at minute twenty, is worse than an honest 25/5. Look at the actual work: is it shallow and interruptible, or deep and defensible? Set the dial to that. You can change it tomorrow.
Scale the break with the session
The break exists to protect the next interval, so it has to grow as the work does. Five minutes is plenty after 25. After a 90-minute block it’s a joke; you need fifteen to come back sharp. If you keep ending sessions more tired than you started, your breaks are probably too short for the intervals you’re running.
When your interval is wrong
A few honest signs to adjust:
- You dread starting. The interval is too long. Shorten it until starting feels easy.
- You’re always mid-thought when it rings and resent stopping. You may be one preset too short.
- You never reach the point where the work carries itself. The interval isn’t long enough to get there.
Whatever you land on, you can set it in seconds. The Passata web timer ships with 25/5, 50/10, and 90/15 as presets, and the extension keeps your choice on every new tab.
Common questions
What is the best Pomodoro interval?
There isn’t one. 25/5 suits shallow, interruptible work; 50/10 suits reading and writing; 90/15 suits deep work you can protect. The best interval is the one that matches the task in front of you.
Is 25 minutes too short?
For some work, yes. If you spend the first ten minutes of every interval just getting warm, the interval is too short — move to 50/10 and see if it feels better.
Can I do 60- or 90-minute Pomodoros?
You can. 90/15 lines up with the body’s natural focus-and-fatigue cycle and works well for one big task. Past 90 minutes, most people’s attention drops off whether they admit it or not.
Should breaks be longer for longer sessions?
Yes. Scale the break with the work: 5 minutes after 25, 10 after 50, 15 after 90. A long stretch of focus needs more than a token pause to recover from.
Why is a Pomodoro 25 minutes?
Because that is what Francesco Cirillo set his tomato-shaped kitchen timer to when he invented the method as a student. It was a practical starting point, never a magic number.
Pick an interval that fits the work, scale the break to match, and then stop tuning it. The people who get the most out of this aren’t the ones with the perfect number. They’re the ones who actually start the timer.