Stopwatch
What Is This Tool?
Our online stopwatch measures elapsed time with lap recording. Click Start to begin, Lap to record split times, and Stop to pause. The stopwatch works in the background when you switch tabs and maintains full millisecond precision. It's useful for sports timing, experiment durations, productivity tracking, and more.
How to Use
- Click Start to begin timing.
- Click Lap to record a split time without stopping the main timer.
- Click Stop to pause the stopwatch.
- Click Reset to clear the time and all lap records.
Common Use Cases
- Timing athletic activities like running laps or interval training
- Measuring how long a task or process takes for productivity analysis
- Recording experiment durations in a science lab setting
- Timing competitive events or game rounds
Tips & Tricks
- Lap times show the split since the last lap, not the total elapsed time.
- The stopwatch continues in the background — switch tabs freely without losing accuracy.
- Use the lap feature to break a long session into measurable segments.
Frequently Asked Questions
What's the difference between the lap time and the total elapsed time?
Each lap shows the duration since the previous lap was recorded (the split), while the main display keeps counting the total elapsed time from the very start.
How precise is the stopwatch?
It maintains full millisecond precision, so it's accurate enough for casual sports timing, cooking, or lab experiment measurements.
Does the stopwatch keep counting accurately if I switch browser tabs?
Yes. It continues running and stays accurate in the background — switch tabs freely without losing time or precision.
Can I record more laps than fit on the screen?
Yes. The lap list scrolls to show all recorded splits, no matter how many laps you've logged during a session.
Does resetting the stopwatch also clear my lap history?
Yes. Reset clears both the main timer and all recorded lap times, returning the stopwatch to zero.
Track time precisely for sports, workouts, experiments, or daily activities with our online stopwatch. Easy to use and accessible anywhere.
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