How to use Online Stopwatch & Timer
The countdown timer runs a customisable timer from any hour, minute and second value down to zero, with audio and visual alerts. It supports pause/resume, resets, lap marking and multiple concurrent timers for use during cooking, exercise intervals, study sessions or any timed activity.
- Set the timer duration using hour, minute and second inputs.
- Click Start to begin the countdown.
- Pause and resume at any point, or reset to the original duration.
- An alert fires when the timer reaches zero.
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Timer vs stopwatch vs countdown
A stopwatch counts up from zero; a countdown timer counts down from a set duration. This tool is a countdown timer. Stopwatches measure elapsed time during an activity; countdown timers enforce a time limit or remind you when a period has elapsed. For live event countdowns (days to a future date), use the Countdown tool.
Worked examples
Focus countdown
Inputs: Set 25:00 and start
Result: Counts down to 0:00, then alerts after 25 minutes
Pause and resume
Inputs: 10:00 timer paused at 6:30
Result: 3:30 elapsed · 6:30 remaining until resumed
Common timer presets and typical uses
| Preset | Typical use |
|---|---|
| 5 minutes | Short break or a quick task check-in |
| 10 minutes | Meditation or a tidy-up sprint |
| 25 minutes | A single Pomodoro focus block |
| 60 minutes | A workout or study session |
Glossary
- Interval training
- Exercise structured as alternating high-intensity and rest periods, often timed precisely.
- Pomodoro
- A productivity technique using 25-minute work intervals followed by 5-minute breaks.
- Countdown
- A timer mode that starts from a set duration and runs down to zero before firing an alert.
- Lap
- A split marker used to track elapsed checkpoints without stopping the primary timer.
Related reading
Frequently Asked Questions
Why use Online Stopwatch & Timer?
- Counts down from any combination of hours, minutes and seconds with a clear progress display
- Fires an audio alert when the timer reaches zero so you do not miss the cutoff
- Supports pause and resume, letting you halt mid-session without losing elapsed time
- Multiple concurrent timers allow separate intervals for different tasks to run in parallel
Common use cases
- Time a 25-minute Pomodoro work block followed by a 5-minute break without watching the clock
- Set a pasta boiling timer while tracking a separate 30-minute oven roast simultaneously
- Run a 90-second rest interval between weightlifting sets and start the next set on the buzzer
- Enforce a 3-minute speaking limit per participant during a stand-up meeting
- Give a student a timed 45-minute mock exam with an audible alert when time is up
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