# Stopwatch & Lap Timer

> A precise online stopwatch with lap timing. Start, stop, and record lap times with millisecond accuracy. Perfect for workouts, cooking, studying, and any timing needs.

**Category:** Utility
**Keywords:** stopwatch, lap timer, timer, timing, milliseconds, split time, workout timer, interval timer, chronograph, time tracking
**URL:** https://complete.tools/stopwatch-lap-timer

## How it works

The stopwatch uses your device's high-resolution timer (`performance.now()`) combined with `requestAnimationFrame` for smooth, drift-free display updates at up to 60 frames per second.

**Lap timing** records the interval between each lap press while tracking the cumulative total. The display shows centisecond precision (1/100th of a second) for readability, while internal calculations maintain full millisecond accuracy.

## Who should use this

- **Athletes and coaches**: Track interval training, sprint times, and recovery periods
- **Students**: Time study sessions using the Pomodoro technique or timed practice tests
- **Cooks**: Keep precise timing for recipes that require exact durations
- **Presenters**: Monitor speech and presentation segment lengths
- **Anyone timing tasks**: Measure how long everyday activities take

## How to use

1. Press **Start** to begin the stopwatch
2. Press **Lap** while running to record a split time without stopping the clock
3. Press **Stop** to pause the timer — press Start again to resume
4. Press **Reset** to clear everything and start over
5. Use **Copy All Laps** to export your lap data as text

## Tips

- The timer continues running in the background if you switch browser tabs
- Lap times show both the individual lap duration and the cumulative total
- The fastest and slowest laps are highlighted in the statistics summary
- You can copy all lap data to paste into spreadsheets or notes

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*Generated from [complete.tools/stopwatch-lap-timer](https://complete.tools/stopwatch-lap-timer)*