Stopwatch
Precise timing with lap tracking
00:00:00.000
Laps (0)
No laps recorded yet
Frequently Asked Questions
How accurate?
Browser-based accuracy to about 1 millisecond. For scientific work, use dedicated hardware.
Split vs lap time?
Split shows total elapsed. Lap shows duration between consecutive points.
Can I export data?
Yes. Copy lap times to clipboard for spreadsheet analysis.
How accurate is a browser-based stopwatch compared to a physical one?
Browser stopwatches are accurate to about 1-4 milliseconds due to JavaScript timer resolution and browser throttling. Physical stopwatches can be accurate to 0.01 seconds. For casual timing, browser accuracy is sufficient.
What is the difference between split time and lap time on a stopwatch?
Split time shows the total elapsed time at each checkpoint. Lap time shows the duration between consecutive checkpoints. For example, splits might be 1:00, 2:05, 3:08, while laps would be 1:00, 1:05, 1:03.