Online Stopwatch with Lap Timer
Need a precise stopwatch in your browser? This free online stopwatch counts up with a clear mm:ss.cs display, records laps with split times, and works with keyboard shortcuts. It stays accurate even when you switch tabs.
Lap Times
| Lap | Lap Time | Total Time | Note |
|---|---|---|---|
| No laps yet. Press Lap while the stopwatch is running. | |||
How to use
- Press Start to begin timing. The display shows minutes, seconds and centiseconds.
- Press Pause to freeze the time, and Start again to continue from where you left off.
- Press Lap anytime to record a split. The stopwatch keeps running and the lap appears in the table.
- Press Reset to clear the display and the lap list so you can start fresh.
Tips
- Use Space to start and pause without touching the mouse — handy during races or experiments.
- Compare the highlighted fastest and slowest laps to find your most consistent pace.
- Keep this tab pinned so you can glance at the time without losing your place.
- For short sprints, the centiseconds make the difference between laps easy to see.
Frequently Asked Questions (FAQ)
How does this online stopwatch work?
Press Start to begin timing. The display shows minutes, seconds and centiseconds. Use Pause to freeze it, Reset to clear it, and Lap to record split times without stopping the clock.
How do lap times work?
Each time you press Lap, the current split is saved in the lap list below the display. It shows the lap number, the lap duration and the total elapsed time, and highlights the fastest and slowest laps.
Are there keyboard shortcuts?
Yes. Press Space to start or pause the stopwatch, and L to record a lap. Press R to reset.
Does it keep running if I switch tabs?
Yes. The stopwatch uses the system clock timestamps, so the timing stays accurate even when the tab is in the background.
Do I need an account?
No. It is free, needs no signup and runs entirely in your browser.