Pomodoro Timer
A Pomodoro timer with 25-minute focus sessions and 5-minute breaks (both adjustable), a long break every 4 sessions, and a chime at each switch.
Work in focused sprints the Pomodoro way: 25 minutes of focus, a 5-minute break, and a longer 15-minute break after four sessions. Set your own focus and break lengths if the classic rhythm doesn't fit, and the timer handles the phase changes, session counting, and chimes for you.
Focus · Session 1 of 4
25:00
0 focus sessions completed · long break every 4
How to use this calculator
- Choose your task before you start — one task per focus session.
- Adjust the focus and break minutes if you like, or keep the classic 25/5.
- Press Start focusing and work until the chime.
- Take the break away from the screen; after 4 sessions, enjoy the long break.
The formula
Phases alternate focus → break. After every 4th completed focus session the break becomes the long break (15 minutes). Elapsed running time is mapped through that cycle to find the current phase and its remaining seconds.
Worked example
Start the classic timer and let it run: at 25:00 it chimes into a 5-minute break, at 30:00 it's back to focus session 2. Let it run 1 hour 55 minutes (6,900 seconds) and you land exactly at the start of the 15-minute long break, with 4 focus sessions completed.
Frequently Asked Questions
What is the Pomodoro Technique?
It's a time-management method from the late 1980s, named after a tomato-shaped kitchen timer: work on one task for a short, fixed sprint (classically 25 minutes), take a short break (5 minutes), and after four sprints take a longer break (15–30 minutes). The fixed rhythm makes starting easier and makes distraction wait until the break.
Can I change the 25 and 5 minutes?
Yes — set the focus and break lengths before you start (the long break stays at 15 minutes and arrives every 4 sessions). Popular variations are 50/10 for deep work and 15/3 for easing into the habit. Changes lock in once a session is under way so the phase math stays consistent.
What happens when a phase ends?
A chime sounds and the timer rolls straight into the next phase — focus flips to break, break flips back to focus — while the session counter and progress bar update. You don't have to press anything between phases; pause or reset whenever you want out of the rhythm.
How long is a full set of four sessions?
With the classic settings: four 25-minute focus sessions (100 minutes) plus three 5-minute breaks (15 minutes) brings you to the long break at 1 hour 55 minutes of elapsed time, and the long break itself runs 15 minutes. This timer's phase engine is exact — at 6,900 seconds elapsed it is in the long break with the full 15:00 remaining.
Does it track my sessions?
It counts completed focus sessions for the current run and shows where you are in the set of four. It's a session counter, not a log — closing or resetting the page clears it, and nothing is stored or sent anywhere.