Stopwatch
Precise online stopwatch with start, stop, reset and lap time recording. Centisecond accuracy.
How to Use the Stopwatch
Click Start to begin timing. Use Stop to pause, Resume to continue, and Reset to clear. The Lap button records split times while the stopwatch is running.
Features
- Centisecond precision — displays time to 1/100th of a second
- Lap times — record multiple split times in a list
- Pause and resume — stop and continue without losing time
- Clean display — large monospace digits for easy reading
Frequently Asked Questions
How precise is this stopwatch?
The stopwatch uses requestAnimationFrame for smooth updates and displays time to centisecond (1/100s) precision.
Does it keep running if I switch tabs?
Yes. The elapsed time is calculated from timestamps, so switching tabs does not affect accuracy.
Can I export lap times?
Currently lap times are displayed on screen. You can select and copy them manually.
Is there a maximum duration?
There is no hard limit. The stopwatch will continue running as long as your browser tab stays open.
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