Precise stopwatch with lap times and centisecond display
An online stopwatch measures elapsed time precisely, counting up from zero with start, stop and reset controls and a lap button that records split times without interrupting the count. It is the digital version of the stopwatch a coach or scientist uses: press start, and it tracks how long something takes down to hundredths of a second, so you can time a workout interval, a cooking step, a presentation rehearsal or how long a task actually takes you.
The lap feature is what sets a real stopwatch apart from a plain timer. Each tap records the current elapsed time as a marker while the clock keeps running, so you can capture every lap of a run, each round of an exercise, or successive checkpoints, then review them side by side afterwards. This tool runs in your browser with centisecond precision and needs no app or sign-up — open the tab and it is ready, keeping accurate time even as you switch to other windows.
A lap records the current elapsed time as a marker while the stopwatch keeps running, letting you log several splits in one session. A reset stops the count and clears it back to zero, ending the timing entirely.
It tracks time to hundredths of a second (centiseconds), which is ample for workouts, cooking, presentations and most everyday timing. For casual use the displayed precision is effectively exact.
Yes. The elapsed time is calculated from real timestamps, so even if the tab is in the background the stopwatch reports the correct total when you return, rather than pausing or drifting.
Reloading the page restarts the tool, so an in-progress count is cleared. Note your time or record a lap before refreshing if you need to keep it, since the stopwatch measures a live session rather than saving history.
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