Millisecond precision stopwatch with lap time tracking.
Click Start to begin timing. The display updates in real time showing minutes, seconds, and hundredths of a second. Press Lap to record the current time and the interval since the last lap. The stop button pauses the timer, and you can resume by pressing start again. Reset clears everything and returns the stopwatch to zero. All lap times are displayed in a scrollable list below the controls.
Each lap records both the total elapsed time and the split time since the previous lap. This is useful for tracking intervals in running, swimming, or any activity where you want to compare segments. The lap list shows the most recent lap at the top so your latest splits are always visible. You can record as many laps as needed during a single timing session.
This stopwatch uses the browser high-resolution timer for accurate millisecond-level precision. While no web-based timer can guarantee the absolute precision of a hardware stopwatch, modern browsers provide timing accuracy well within a few milliseconds, which is more than sufficient for most practical timing needs. The stopwatch runs entirely in your browser with no network requests or data collection.