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Chronometer / Stopwatch
Online stopwatch with start, stop, reset, and lap timing. Display in mm:ss.ms format with a lap times list. Works entirely in your browser.
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Frequently Asked Questions
How accurate is it?
The stopwatch uses requestAnimationFrame and performance.now() for sub-millisecond precision. Accuracy depends on browser and system performance.
Can I record lap times?
Yes, click the Lap button while the stopwatch is running. Lap times are listed with the most recent at the top.
Related Tools
How to Use
- 1 Click **Start** to begin timing.
- 2 Click **Lap** to record lap times while the stopwatch runs.
- 3 Click **Stop** to pause, **Resume** to continue, or **Reset** to start over.
- 4 Lap times are listed with the most recent at the top.