Stopwatch
Start, stop and record laps with millisecond precision. Press Space to start/stop and L for a lap.
00:00.000
Precision
Elapsed time is measured with your browser’s high-resolution monotonic clock, which is not affected by system clock changes or time synchronization, so it stays accurate over long sessions.
Lap time is the duration of each lap; split time is the total elapsed when the lap was recorded. Export laps as CSV for spreadsheets. The stopwatch keeps running across page reloads.
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