Online stopwatch with lap times

What it does and when to use it

Measure elapsed time with a free online stopwatch, without registration. Start, pause and resume whenever you need, and record lap times without stopping the clock.

How to use the online stopwatch

Press Start to begin and Pause to stop timing. Resume continues from the accumulated time, excluding the pause. To clear the time and all laps, pause first and press Reset.

The display shows hours, minutes, seconds and hundredths. Use Space to start or pause, L for a lap and R to reset while paused. Buttons retain their normal keyboard controls.

Lap times and total time

Press Lap while running to record up to 100 laps. Split measures time since the previous lap; total measures time since the start, excluding pauses. Newest laps appear first.

Precision and privacy

Time is calculated using a monotonic browser clock, without adding screen refresh intervals. In a background tab the display may refresh less often and catches up when you return. Device sleep can affect timing: do not use this for official timekeeping.

Keep this page open. Reloading, switching languages or closing the tab clears times and laps. Your times stay only on this page.

Limits and checks

• Yes. Press Lap while running: the clock continues and records split and total times, up to 100 laps.