Online Stopwatch with Laps
A highly accurate online stopwatch supporting milliseconds.
00:00.00
StartLapReset
Lap Time
| Lap # | Lap Time | Split Time |
|---|---|---|
No data | ||
No laps recorded
How to Use
- 1Press the green Play button to start timing.
- 2Press the red Stop button to pause the stopwatch.
- 3Press the Flag button while running to record a lap split time.
- 4Press Reset to clear the timer and all recorded laps.
- 5Use 'Clear Laps' in the table header to remove lap records without resetting the timer.
About Stopwatches
Centisecond Precision
This stopwatch updates every 10ms, displaying time in hundredths of a second (centiseconds), suitable for most sports timing needs.
Lap vs Split Time
A lap time measures the duration of each individual lap. A split time shows the total elapsed time at the moment the lap button was pressed.
Browser Accuracy
JavaScript timers may have slight drift due to browser tab throttling. For professional-grade timing, dedicated hardware stopwatches are recommended.