Stopwatch

Online stopwatch with lap timing, accurate to the hundredth of a second.

Elapsed Time

00:00.00

What is a Stopwatch?

A free online stopwatch with start, pause, lap, and reset controls. It tracks elapsed time to the hundredth of a second and keeps a list of lap times.

How to Use the Stopwatch

Timing is simple:

  • Click start to begin timing.
  • Click lap to record split times.
  • Click pause to stop the display temporarily.
  • Click reset to clear the stopwatch and laps.

Tips

  • The stopwatch uses high-resolution timestamps for accuracy.
  • Stays accurate even when the browser tab is in the background.
  • Laps display in reverse order, with the most recent first.

Frequently Asked Questions

How accurate is this stopwatch?+
It uses high-resolution timestamps (Date.now()), with precision of about 1 millisecond. The display updates every 10 milliseconds. That is more than enough for everyday timing.
Does it keep working in the background?+
Yes. The stopwatch uses absolute timestamps rather than interval counting, so it stays accurate even when the tab is in the background.

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Stopwatch — free online stopwatch, online stopwatch, lap timer, free stopwatch, stopwatch with laps, hundredth-second stopwatch. No signup required. Works in your browser.