60 Minute Timer
An hour on screen — the unit a schedule is written in, not the unit a task is.
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The hour as a container
An hour is how schedules are written, which makes a sixty-minute countdown a different kind of tool from the short ones. Nobody watches it. It sits in the corner of a room and gets glanced at four or five times, and each glance answers a planning question rather than a pacing one: is there time to start the next section, or is it time to begin wrapping up.
In schools that use block scheduling, sixty minutes is a period, so this is the block-period equivalent of the forty-five-minute timer. It also covers a full-length exam, a workshop session, a departmental meeting, and any lesson where the plan is a sequence of activities rather than a single task — in which case run the hour on the projector and use shorter timers for individual activities inside it.
What an hour-long countdown has to get right
Accuracy over an hour is the part cheap timers get wrong. Anything that counts by adding up ticks drifts, because a browser throttling a background tab drops some of them. This clock works the opposite way: it stores the moment the timer ends and recalculates the remaining time from the current time on every update, so an hour later it is still correct, whether or not the tab stayed in front.
The display stays in minutes and seconds for the whole hour rather than switching to an hours field, so it opens at 60:00 and counts down through 59:59. For anything longer than an hour — a deadline later today, a date next month — a duration timer is the wrong shape, and a countdown to a specific date and time is the right one.
Embed this timer
An hour-long embedded timer is genuinely useful on a page people will keep open — a workshop agenda, an exam instructions page, a live event page — because it stays correct for the whole session without being touched. Generate it as the session opens, and remember it counts from the moment the code is created rather than from when a visitor loads the page.
Frequently asked questions
Can I run a timer longer than sixty minutes?
Yes. The classroom timer builder accepts up to ninety-nine minutes in the custom field. Beyond that, use a countdown to a specific date and time from the homepage — for anything measured in hours or days, that is the right tool.
Does the display show hours?
No. It shows total minutes and seconds throughout, so a sixty-minute timer opens at 60:00 and ticks to 59:59 rather than reading 01:00:00. Every page in this section uses the same format, which keeps the digits large and the reading unambiguous at a distance.
Will the timer stay accurate for the full hour?
Yes. The remaining time is recalculated from a fixed end point on every update rather than accumulated tick by tick, so nothing drifts — including if the tab sits in the background for most of the hour and you switch back near the end.
Related durations
See also: Count down to a specific date and time · Days Until pages for upcoming events