# Pomodoro Timer > Pomodoro timer: run 25/5 focus sessions with fully adjustable work and break lengths to beat procrastination. Free, private, runs in browser, no signup. - **Canonical URL:** https://boringtoolskit.com/pomodoro-timer/ - **Category:** Time & Work - **Evidence level:** authored-methodology - **Reviewed:** 2026-09-20 - **Last verified:** 2026-10-12 - **Privacy:** Inputs and results stay in this browser unless the page clearly labels an external request. ## How it works One pomodoro = 25 minutes of single-task work + 5 minutes break. After 4 consecutive cycles, take a longer break of 15–30 minutes. The timer enforces the cycle: it counts down the work interval, then the break, and tracks completed pomodoros. ## Worked example A 2-hour block at 10:00: 25 min work → 5 min break → 25 → 5 → 25 → 5 → 25, then a 20-minute long break ends the session at 12:00 with four completed pomodoros. ## Assumptions - The classic 25/5/15–30 defaults are pre-set; the work-interval length is user-adjustable. - Break timing follows the original method: short break every cycle, long break after four. - The timer runs in your browser; a closed tab pauses the session. ## Common questions ### What is a pomodoro timer and how does it work? A pomodoro timer breaks work into focused intervals — typically 25 minutes of work followed by a 5-minute break, with a longer break after every four cycles. Start the timer above, work one task until it rings, then actually step away during the break. ### Why exactly 25 minutes? It's the interval Cirillo settled on with his kitchen timer, short enough to feel urgent and long enough to make progress. Research on attention doesn't single out 25 as magic — the commitment and break structure matter more than the number. ### What if I finish my task before the timer rings? The pomodoro is indivisible: use leftover minutes to review what you did, note the next step, or over-learn the material. Don't start a new task mid-interval. ### What do I do when interrupted? Log it and defer it if possible ('inform, negotiate, schedule, call back' in the original method). If the interruption truly can't wait, the pomodoro is void — handle it, then start a fresh one. ### How long should breaks be? 5 minutes after each cycle, 15–30 after every fourth. Take them away from the screen: walk, stretch, hydrate. A break spent in your inbox doesn't restore attention. ### Is the pomodoro technique good for studying? Yes — it's popular with students because revision chunks map cleanly onto intervals and the countdown fights procrastination. Pair it with planning: list the topics, assign pomodoros, review at the end. ### Can I change the interval length? Absolutely — the original numbers are a default, not a rule. 50/10 and 90/20 suit deep work; the timer above accepts any custom work length. ## Related tools - /ten-minute-timer/ - /thirty-minute-timer/ - /bpm-to-ms-calculator/ ## Sources - [Calculator methodology and reference cases](https://boringtoolskit.com/methodology/) - [Pomodoro Technique](https://en.wikipedia.org/wiki/Pomodoro_Technique) --- *Local planning estimate. Verify current terms, rates, and policies before acting.*