⏱️Stopwatch

A simple stopwatch with lap tracking functionality.

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About Stopwatch

A clean, reliable browser-based stopwatch with millisecond precision and unlimited lap tracking. Record split times for workouts, experiments, or any time-critical task — all laps are listed with their individual and cumulative times, ready to copy or export.

How to Use Stopwatch

1
Start the stopwatch
Click 'Start' to begin timing. The display shows elapsed time in hours, minutes, seconds, and milliseconds.
2
Record laps
Click 'Lap' at any point to record a split time without stopping the overall timer.
3
Stop and review
Click 'Stop' to pause, then review your lap times in the list below. Click 'Reset' to clear and start again.

Common Use Cases

Timing athletic performance during training sessions or races
Measuring how long specific tasks or processes take for productivity analysis
Recording split times for cooking, science experiments, or lab work
Timing presentations or speeches during rehearsal

Frequently Asked Questions

How accurate is the browser stopwatch?

The stopwatch uses the browser's high-resolution performance timer, providing millisecond-level accuracy suitable for timing workouts, experiments, and most everyday tasks.

Can I record lap times?

Yes — click the 'Lap' button at any point to record a split time. Each lap is displayed with its individual duration and the cumulative elapsed time.

Does the stopwatch keep running if I switch tabs?

Yes — the stopwatch continues running in the background when you switch to another tab. The display updates accurately when you return to the tab.