Online Stopwatch

About this stopwatch

This stopwatch uses Date.now() to measure elapsed time accurately, even when the browser tab is not active. It updates at 50ms intervals to show hundredths of a second.

How to use it

1. Click Start to begin counting.
2. Click Lap to record the current split time without stopping.
3. Click Pause to pause. Click Start again to resume from the same point.
4. Click Reset to clear everything and go back to zero.

Common uses

• Timing runs, laps, or exercise sets
• Recording how long tasks take for time-tracking
• Speed contests and games
• Timing presentations or speeches
• Any situation where you need a quick in-browser timer