45 Minute Timer
A timer preset to 45 min. Hit Start and the countdown begins — with an alarm at the end.
45:00
Free — no install, no sign-up
How to use
- Hit Start — 45 min is already set.
- Go Fullscreen for a huge display; the tab title counts down too.
- The alarm rings at zero; hit 'Stop alarm' to silence it.
Frequently asked questions
Can I tweak the duration?+
Sure — edit the minute and second fields before starting; 45 min is just pre-filled. Other presets are linked below.
Can I pause partway and pick it up again?+
Pausing and restarting continues from the time that was left. In a long focus block, though, the pause is usually where the flow breaks — it is generally better to run it to the end and schedule the break separately.
Is it accurate in a background tab?+
Yes. The countdown is anchored to the wall-clock end time rather than accumulated ticks, so browser tab throttling never makes it drift.
How does fullscreen work?+
Hit the Fullscreen button and the countdown fills the whole screen — perfect for classroom TVs and projectors, presentation practice and exam timing. Press ESC to exit.
I don't hear the alarm.+
Browsers only allow sound after you've interacted with the page. Pressing Start enables it automatically, so if you started the timer normally the alarm will ring. Also check your device volume and mute switch.
What if my screen turns off?+
While running, the page requests a screen Wake Lock. Support varies by device and browser, so for critical timers keep the screen on.
Is it really free?+
Yes. No sign-up, no install, no usage limits. The site is ad-supported.
Guide
When a 45 min timer helps
45 min covers long-form activities: class periods and lectures, timed exam practice, baking and oven dishes, laundry cycles, full workout routines.
Long timers live in background tabs — and because this one is anchored to the wall clock, hours of neglect cost it zero accuracy.
Forty-five minutes — one class period
A school period usually runs 45 to 50 minutes, which makes this a natural unit when you want study to follow the same rhythm as a timetable.
A yoga or pilates class, a running session and a great many meetings are scheduled at this length too. It works as an alternative for deep work when a 25-minute pomodoro feels too short.
Why it stays accurate
Naive web timers subtract one second per tick and drift by minutes in background tabs. This one fixes the end time the moment you press Start and always displays the difference from the actual clock — leave the tab alone as long as you like, it won't drift.