Stopwatch

Precise stopwatch with lap timing capabilities. Track elapsed time with millisecond accuracy and record split times.

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How to Use Stopwatch

How to Use the Stopwatch

  1. Start: Click the Start button to begin timing.
  2. Lap: Click Lap to record a lap time while the stopwatch continues running.
  3. Stop: Click Stop to pause the stopwatch.
  4. Resume: Click Start again to continue from where you stopped.
  5. Reset: Click Reset to clear the time and all lap records.
  6. Review laps: Scroll through your recorded lap times below the stopwatch.
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Features

  • Millisecond precision
  • Unlimited lap times
  • Split time display
  • Start, stop, resume controls
  • One-click reset
  • Large, readable display
  • Keyboard shortcuts
  • Works in background
  • Export lap times
  • Mobile-friendly touch controls
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About Stopwatch

When you need to measure elapsed time precisely, our stopwatch provides accurate timing with lap functionality. Track total time and record intermediate splits—essential for sports, experiments, and time studies.

Stopwatch Features

Professional timing capabilities:

  • Millisecond precision: Accurate to 1/1000th of a second
  • Lap times: Record intermediate times without stopping
  • Split display: See both lap and total elapsed time
  • History: Review all recorded laps

Controls

Start/Stop: Toggle timing. Lap: Record time without stopping. Reset: Clear timer and lap history. Keyboard shortcuts available for hands-free operation.

Use Cases

Sports: Race times, interval training, practice drills. Cooking: Precise timing for techniques. Productivity: Time task completion. Research: Experimental timing measurements.

Accuracy Note

Browser-based timing is accurate for most purposes but not laboratory-grade. For scientific measurements requiring microsecond precision, use dedicated hardware timers.

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Frequently Asked Questions

How precise is the stopwatch?
Our stopwatch displays milliseconds and is accurate to your browser's timing precision (typically within a few milliseconds). For absolute precision, dedicated hardware is better, but for most timing needs, browser-based stopwatches are sufficiently accurate.
Can I record lap times or splits?
Yes! Click "Lap" while running to record split times without stopping. See individual lap durations and cumulative time. Great for timing intervals, comparing attempts, or breaking down a longer activity into segments.
Does the stopwatch work offline?
Yes, once the page loads, no internet connection is needed. The timer runs entirely in your browser. Times are preserved even if you accidentally close the tab (within the same browser session). Bookmark the page for quick access.
Can I run multiple stopwatches?
Yes! Open multiple stopwatch instances to track several activities simultaneously. Each operates independently with its own start/stop/lap controls. Useful for comparing parallel activities or tracking overlapping events.
How do I export my timing data?
Export lap times and totals as CSV, JSON, or plain text. This lets you analyze data in spreadsheets, include in reports, or save records. All timing data is formatted for easy import into other tools.
Is there a keyboard shortcut for the stopwatch?
Yes! Press Space to start/stop, L for lap, R to reset. These shortcuts allow timing without looking at the screen - useful when timing physical activities. Keyboard shortcuts work when the stopwatch has focus.