Stopwatch

Lap vs Split Times

A lap time is the elapsed time for that individual segment only (time since the last lap). A split time (shown in the Split column) is the cumulative total time from the very start up to that lap — useful for races where you want to know overall progress at each checkpoint.

Precision

The display updates every 50 ms and shows time to the nearest millisecond. The underlying timer uses performance.now() — a high-resolution timestamp accurate to sub-millisecond precision in modern browsers.

Best & Worst Laps

After recording two or more laps, the fastest lap is highlighted in green and the slowest in red — useful for identifying your best and worst intervals at a glance.