Stopwatch
Accurate online stopwatch with start, pause, lap tracking, and split times.
Frequently Asked Questions
How accurate is the stopwatch?
It uses requestAnimationFrame and the high-resolution clock, accurate to the hundredth of a second. Background tab throttling can affect precision, so keep the tab active for best results.
What are laps for?
Laps record the total time at the moment you press Lap, and the split (time since your previous lap) is shown next to each. Useful for timing repeated intervals.
Does it keep running if I leave the page?
No. The stopwatch state lives in this browser tab. Closing or refreshing the page resets it.
Is anything sent to a server?
No. The stopwatch runs entirely in your browser.
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