45 Minute Timer
Free shareable timer - copy the link and anyone can start counting down instantly.
Why a 45 minute timer?
Forty-five minutes is a class period. It is the most common single-lesson length in secondary schools worldwide, and by extension the length of most exam sections, revision blocks and tutoring sessions built to mirror the school day.
It is also about as long as most people can sustain genuinely focused work before the returns drop off. Long blocks feel productive but tend to include more recovery than they appear to; forty-five minutes with a real break afterwards usually beats ninety minutes of drift.
What people use a 45 minute timer for
- Class periods. The standard secondary school lesson length - share the link so the whole room sees the same clock.
- Exam sections. Timed practice under real conditions, which is the only way section pacing becomes automatic.
- Gym sessions. A full strength session including warm-up, working sets and rest.
- Extended focus blocks. For people who find a 25-minute pomodoro too short to get into difficult work.
- Tutoring and lessons. The usual booked length for a one-to-one session.
Other preset timer lengths
Frequently Asked Questions
How long is a school class period?
Forty to fifty minutes is the most common range, with forty-five as the typical figure. Schools running block schedules use longer periods, often ninety minutes.
Is 45 minutes better than a 25-minute Pomodoro?
It depends on the work. Tasks with a long warm-up - writing, debugging, mathematical problem solving - often suit a longer block, because the first few minutes go on reloading context. Shorter blocks suit tasks you can drop into immediately.
Can I share this link with my class?
Yes - just copy the link from the box above and paste it into your LMS, email, or messaging app. When students open it they get a 45m timer that's ready to start with one tap. No account or download needed.
Does the timer save my progress?
The timer runs entirely in your browser - progress is not saved between page loads. If you refresh or close the tab the timer resets to 45m. For a timer that auto-starts when someone opens the link, add ?autostart=1 to the URL or use the shareable timer generator.
Can I add a label to my timer?
Absolutely. Add a ?label= parameter to the URL - for example https://stopwatch.now/timer-link/45m?label=Math+Quiz. The label appears above the countdown. You can also use the timer link generator to build a labelled timer link without editing URLs by hand.
Can I make the timer auto-start when someone opens the link?
Yes. Add ?autostart=1 to the URL. For example: https://stopwatch.now/timer-link/45m?autostart=1. The timer will begin counting down the moment the page loads - no click required.