Stopwatch

About this tool

A precise digital stopwatch is an essential tool for timing events, tracking performance, and measuring intervals. Our browser-based Stopwatch offers millisecond accuracy with lap/split timing functionality, making it useful for athletic training, cooking, presentations, scientific experiments, and any situation requiring precise time measurement. The clean interface shows elapsed time clearly, and the lap feature records split times while the main timer continues running. All timing runs locally in your browser using high-resolution performance APIs.

How to use Stopwatch

1. Click 'Start' to begin timing.
2. Click 'Lap' to record a split time while the timer continues.
3. Click 'Stop' to pause the stopwatch.
4. Click 'Reset' to clear the time and all laps.

Tips & best practices

• Use lap times to track intervals during workouts or presentations.
• The stopwatch continues running when you record laps.
• Copy lap times for analysis in spreadsheets.
• The timer uses high-resolution browser APIs for accuracy.

Common use cases

• Timing athletic exercises, runs, and workout intervals.
• Measuring cooking and baking times precisely.
• Tracking presentation practice and speech timing.
• Scientific experiments requiring precise time measurement.

Privacy

This tool runs entirely in your browser. We do not upload, store, log, or process your input on any server. Open your browser's DevTools Network tab to verify — there is no outbound request with your data. See our Privacy Policy for details.