Free Stopwatch with Lap Times
Precise stopwatch with lap recording. Start, stop, reset and track every lap with millisecond accuracy.
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How to Use the Online Stopwatch
Click Start to begin timing with millisecond precision. Use Lap to record split times while running. Stop pauses the timer, Reset clears everything. All laps show individual and cumulative times. Copy all laps to your clipboard for records.
When to Use an Online Stopwatch
- Timing workout intervals, running laps, or fitness circuit training sessions
- Measuring task completion times for productivity analysis and time management
- Conducting timed presentations, debates, or classroom activities
Frequently Asked Questions
How accurate is this stopwatch?
It uses requestAnimationFrame and Date.now() for accuracy within a few milliseconds, sufficient for sports, cooking, and productivity tracking.
Will it keep running if I switch tabs?
Yes. The timer uses absolute timestamps so switching tabs does not affect accuracy. The elapsed time is correct when you return.
Can I export my lap times?
Yes. Click Copy All Laps to copy recorded times in text format to your clipboard for pasting into spreadsheets or documents.
All calculations happen in your browser. No data is sent to any server.
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