Online Stopwatch
Precise stopwatch with lap timing, split tracking, and best/worst lap highlighting. Start, pause, lap, and reset — right in your browser.
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Lap Times
0 laps
No laps recorded yet. Press Lap while the stopwatch is running.
Free Online Stopwatch — Millisecond Precision, No Download Needed
Our free online stopwatch delivers precise timing right in your web browser — no app download, no account, no complexity. With centisecond (1/100th of a second) precision, it's suitable for timing workouts, cooking, sports events, experiments, coding sessions, or any activity where accurate elapsed time matters.
Unlike basic phone stopwatches, our tool records lap times and split times in a clean table, automatically highlights your fastest and slowest laps, and works seamlessly on any device — desktop, tablet, or mobile.
Keyboard Shortcuts
- Space — Start or Pause the stopwatch
- L — Record a lap time (while running)
- R — Reset to zero
How to Use the Online Stopwatch
- Start: Click the green "Start" button to begin timing. The button turns red and changes to "Pause."
- Pause: Click "Pause" to freeze the time. Click "Start" again to resume from where you left off.
- Lap: Click "Lap" while the timer runs to record the current lap. Each lap shows the time for that lap and the total elapsed time (split).
- Reset: Click "Reset" to clear the timer and all laps back to zero.
- Fastest & Slowest Laps: After 3+ laps, the best time is highlighted in green and the worst in red automatically.
Frequently Asked Questions
Our stopwatch records time to centisecond precision (1/100th of a second). It updates every 10 milliseconds for a smooth, accurate display suitable for sports, workouts, and experiments.
Click the "Lap" button while the stopwatch is running to record a lap. Each lap shows the lap time and the cumulative split time. The fastest lap is highlighted in green and the slowest in red automatically after you have recorded 3 or more laps.
Yes! Press Space to start or pause, L to record a lap, and R to reset the stopwatch. These shortcuts make timing events hands-free and very convenient for activities like workouts.
Yes, the stopwatch is fully responsive and works on smartphones and tablets. The large touch-friendly buttons make it easy to operate during physical activities on any device.
The stopwatch can run for many hours without limit. It uses JavaScript high-resolution timestamps which have no practical maximum for everyday timing use cases.
Yes. The stopwatch stores the start timestamp and calculates elapsed time each update, so it stays accurate even if you switch browser tabs or minimize the window.