How accurate is the stopwatch?

The stopwatch uses Date.now() which provides millisecond-level accuracy. The display shows centiseconds (1/100th of a second) for practical precision.

How do I record laps?

Click the blue flag button while the stopwatch is running. Each lap records the split time (time since last lap) and total elapsed time.

What do the green and red highlights mean?

When you have 2+ laps, the fastest lap is highlighted in green and the slowest in red — helping you identify your best and worst splits.

Does it keep running if I switch tabs?

Yes! The timer uses absolute timestamps, so it stays accurate even if you switch browser tabs or minimize the window.

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Online Stopwatch

Free online stopwatch with lap timer — accurate to centiseconds.

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How to Use Online Stopwatch

1
Click the green play button to start the stopwatch.
2
Click the blue flag button to record a lap while running.
3
Click the yellow pause button to pause the timer.
4
Click the reset button to clear the timer and all laps.

About Online Stopwatch

A clean, accurate online stopwatch with lap timing functionality. Start, pause, and reset with one click. Record unlimited laps and see split times with best/worst lap highlighting.

The stopwatch displays hours, minutes, seconds, and centiseconds (1/100th of a second) with a large, easy-to-read display. Lap times are shown in a scrollable list with the fastest lap highlighted in green and the slowest in red — just like a professional sports timer.

Built with high-resolution timing using Date.now() for accuracy. Perfect for workouts, cooking, study sessions, sports timing, or any task where you need precise time measurement. No installation needed — works instantly in your browser.