1 hour timer
1 hour on the clock, starting now.
Space to start or pause, R to reset, F for fullscreen.
- Starts in one click
- Loud repeating alarm
- Adjustable if you need more or less time
How to use the 1 hour timer
- Click Start to begin counting down from 1 hour.
- Adjust the time first if you need a little more or less.
- The alarm sounds at zero. Click Dismiss to stop it.
What runs close to an hour
| Use | Why 1 hour |
|---|---|
| Timed exam | A common full length for tests and certification exams |
| Roasting a whole chicken | A typical roast time for a small to medium bird |
| A therapy session | Traditionally booked as an hour, though many sessions actually run 45 to 50 minutes |
| Daily activity for kids | Guidelines often recommend at least 60 minutes a day for children and teens |
| A full gym session | A common complete workout length including warm-up and cool-down |
| A board game night round | Many tabletop games run close to an hour per game |
Splitting an hour into something more useful
An hour is long enough that most people benefit from breaking it up rather than staring at one long countdown. Two Pomodoro-style cycles, or an interval workout of rounds inside that hour, both make better use of the time than a single unbroken block for most tasks.
For a straightforward hour, like an exam or a roast, this page keeps things simple: set it once, get on with the hour, and get a clear alarm at the end.
Keeping a long countdown reliable
- Plug in your device if you are running the timer for a full hour on battery, since a browser tab left open that long can add up in power use.
- Turn on Notify me when done so you still get an alert even if you have switched to another window well before the hour is up.
- Keep the tab open rather than closing it and reopening later, since closing it fully stops the countdown.
1 hour timer FAQ
What is a 1 hour timer good for?
Timed exams, a long bread or roast in the oven, a focused work session, or a full workout all fit into an hour.
Can I change it to a different length?
Yes, edit the hours, minutes or seconds fields before you click Start, or use the plus 1 minute and plus 5 minute buttons.
Does it drift over a full hour?
No. It calculates the time left from the clock at every update, so an hour-long countdown is just as accurate at the end as at the start.
What is the '50-minute hour'?
It is a long standing convention in therapy and counseling where a booked hour session actually runs 45 to 50 minutes, leaving the therapist time to write notes and reset before the next client. Set this timer for 50 minutes to match that convention.
How much daily exercise do children need compared to adults?
Guidelines commonly recommend at least 60 minutes of physical activity a day for children and teens, more than the roughly 30 minutes a day typically recommended for adults.
How long does it take to roast a whole chicken?
A small to medium chicken often takes close to an hour in the oven, though exact time depends on its weight and your oven temperature, so check with a meat thermometer rather than the timer alone.
Can I use this for a study session longer than an hour?
Set it again once it finishes, or use it as a checkpoint to decide whether to take a short break before starting another hour, rather than trying to run one continuous countdown for several hours.
Will the alarm still work if my laptop is closed?
No. Closing the lid puts most laptops to sleep, which pauses everything in the browser, including this timer. Keep the screen on and the lid open for the alarm to sound at the end of the hour.