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45 minute timer
Forty-five minutes, loaded and ready. Press start.
Ready
45:00Add or take time off while it runs with the buttons under the clock. The countdown is worked out from the clock, so a tab left in the background comes back correct.
The end sound is generated in your browser, so nothing is downloaded and it works offline.
Space start or pause · R reset · F full screen
No signup · No accounts · Free forever
Activity presets
Forty-five minutes matches a typical school class period, a common therapy-session length, and many gym workout classes, long enough for a real session with a beginning, a middle and an end, without needing to be checked constantly along the way.
This page loads already set to forty-five minutes, full screen and readable from across a classroom or a studio, with the same silent-mode flash and drift-free accuracy as every duration on this site. Add or take off time without losing the run if the session needs a small adjustment.
Need a different length? The full timer page has quick presets from ten seconds to ten minutes plus a custom field for anything else, and pairs well with charades cards, bingo cards and word searches if you are running a game rather than a work session.
FAQ
Is this timer free?
Yes, completely, no signup, no account and no limit on how many times you run it. Pick it and press start.
Does it keep correct time in a background tab?
Yes. The countdown is worked out from the clock rather than counted tick by tick, so a tab you switched away from comes back showing the correct time even if the browser paused it while it was hidden.
Is 45 minutes a common class period length?
It is a commonly used length for a single school class period or a gym class, long enough to properly get through a lesson or a workout without running into the length of a full double period.