Calculators & Time
Focus and break sessions
Twenty-five minutes of focus, then a break. The presets are one click apart and the completed sessions are counted, which is most of what the technique needs.
25:00
Session
The end time is fixed when you press start and compared against the system clock, so a background tab — where browsers throttle timers to once a minute — does not make the timer run long. The alert is a synthesised tone and needs one interaction with the page before browsers will allow it.
- Runs in your browser
- No account required
- Free to use
How it works
The intervals are the method
Twenty-five minutes of single-tasking, then five off, with a longer break every fourth round. The specific numbers matter less than the commitment to stop when the timer says so — the point is the boundary rather than the duration.
Accurate in a background tab
Browsers throttle timers in tabs you are not looking at — often to once a minute — so anything that counts its own ticks loses time. This compares against the system clock on every update, so switching tabs changes nothing about when it finishes.
What it does
Focus and break presets
25, 5 and 15 minutes, switchable mid-session.
Session count
How many you have finished, which is the number worth watching over a day.
Sound at the end
Synthesised, so nothing is downloaded.
Runs in your browser
No account and no upload — what you type is never sent anywhere. Analytics records that the tool was opened, never what you put into it.
Practical advice
Getting a better result
- Take the break. Working through it turns the method into a timer that occasionally interrupts you.
- A long break every fourth session is the usual pattern, though nothing enforces it here.
- The count resets on refresh — nothing is stored, so write the number down if the day matters.
Questions
Things people ask
Why 25 minutes?
It is short enough to start without dread and long enough to get somewhere, which is the whole justification. The technique’s originator picked it with a kitchen timer; nothing about it is special, and adjusting it is fine.
Are my sessions saved?
No. Nothing is stored, so the count resets when you refresh. That is deliberate — this page has no storage and makes no requests.
Related tools
Calculator
Type an expression and see the answer as you go.
Runs entirely in your browser
Open toolScientific Calculator
Trigonometry, logarithms and powers, with a live answer.
Runs entirely in your browser
Open toolPercentage Calculator
Work out percentages, changes and increases four ways.
Runs entirely in your browser
Open toolAge Calculator
Age in years, months and days, counted by the calendar.
Runs entirely in your browser
Open toolWho builds these
Free tools by day. Websites that earn their keep by trade.
KuConvert is built by KUDUY, a web design and development agency. From custom WordPress builds to SEO and e-commerce, everything they do is engineered to bring you more qualified traffic and turn it into revenue.
Web Design
Custom, conversion-focused web design that captivates visitors and turns them into paying customers. Mobile-first, fast, and built to rank.
Web Development
Custom WordPress websites built with clean code, blazing-fast performance (Core Web Vitals optimised), and enterprise-grade security.
E-Commerce
Online stores that convert visitors to customers with seamless shopping experiences.
SEO
Technical SEO, keyword research, on-page optimisation and local SEO strategies that drive qualified organic traffic.
Digital Marketing
Data-driven campaigns that deliver measurable ROI across every channel.
Branding
Memorable brand identities that stand out in any market and build lasting trust.
Website Help
One-on-one expert support for bug fixes, updates and ongoing maintenance — without a long-term retainer.
Fixed scope, no surprise invoices
Most sites ship in four to eight weeks with the scope and the price agreed up front.
SEO from day one
Search is designed into the build — structure, schema and Core Web Vitals — not retrofitted.
A team, not a ticket queue
A project manager, a designer and a developer you can actually reach.
Need your whole site to load this fast?
Images are usually the heaviest thing on a page and the easiest win. KUDUY works on site speed, image delivery and Core Web Vitals for teams who would rather not do it by hand.
This tool runs entirely in your browser. Your files are never uploaded.