About this tool
The Timer & Stopwatch combines a precise countdown timer and a lap-capable stopwatch in one tool. Set a target duration, run a workout, or clock multiple laps — with an audible alarm when the timer hits zero.
Timer & Stopwatch
Countdown timer with alarm and stopwatch with lap tracking
00:00.00
How to use
- Switch between Timer and Stopwatch modes at the top.
- For the timer, set hours, minutes, and seconds and press Start.
- For the stopwatch, press Start and use Lap to record split times.
- Pause or resume at any time; the running total is preserved.
- Reset to clear all values when you are done.
Common use cases
- Timing workout intervals.
- Running a cooking timer without leaving the tab.
- Measuring speech rehearsal durations.
- Tracking focus sprints with the Pomodoro technique.
- Recording lap times during practice runs.
Frequently asked questions
Does the alarm still play if I switch tabs?
Yes. The alarm is scheduled with browser APIs so it still plays even when the tab is in the background.
Is the timing accurate?
Yes. It uses the monotonic performance clock and stays accurate across long runs.
Can I run two timers at once?
Not on the same page. Open a second tab for a second independent timer.
Is anything stored?
Only your last preset is remembered locally so you do not have to re-enter your favorite duration.