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Press Lap while running to record split times.
About
The Stopwatch measures elapsed time with millisecond precision and lets you record multiple lap splits. It is ideal for time tracking tasks, sports, presentations, or any situation where you need accurate elapsed time measurement directly in your browser.
How to use
- 1 Click Start to begin timing.
- 2 Click Lap to record a split time without stopping the main timer.
- 3 Click Stop to pause and Reset to clear all lap times.
- 4 All lap times are listed in the table below for easy review.
- How precise is the online stopwatch?
- The stopwatch uses the browser's high-resolution performance.now() timer, which provides sub-millisecond precision. Display updates happen every 10 milliseconds, giving you three decimal places of accuracy that are more than sufficient for most timing tasks.
- Does recording a lap pause the main timer?
- No. Pressing Lap records the current elapsed time as a split without stopping or pausing the main stopwatch. The timer continues running seamlessly, so you can record as many laps as you need during a continuous timing session.
- Can I copy the lap times?
- Yes. The lap time table is selectable text, so you can select all lap times and copy them to your clipboard for pasting into a spreadsheet, notes app, or document. Each lap shows its individual split time and cumulative elapsed time.