Stopwatch
Precision timing with lap support and simple stats.
Lap Times
Statistics
Fastest Lap
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Slowest Lap
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Average Lap
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How to Use the Stopwatch
Start: Click the Start button to begin timing.
Lap: Record intermediate times without stopping the timer. Perfect for tracking multiple rounds or intervals.
Stop: Pause the timer to review your time. Click Start again to continue.
Reset: Clear the timer and all lap times to start fresh.
Precision: Accurate to 1/100th of a second (10 milliseconds) in typical browsers.
Stopwatch FAQs
How precise is this online stopwatch?
The stopwatch updates every 10 milliseconds using browser timers. This is more than precise enough for workouts, study sessions, and everyday timing, but it is not intended for laboratory‑grade or official competition use.
Are lap times kept if I refresh or close the page?
No. The current timer state and lap list are stored only in memory while the page is open. Refreshing or closing the tab clears the stopwatch and all lap records.
Can I control the stopwatch with the keyboard?
Yes. You can press the Space bar to start or stop the timer, press L to add a lap while it is running, and press R to reset the stopwatch.
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