Date & Time

Online Stopwatch

Press Start or Space and keep the elapsed time as the visual focus. Lap history and display settings appear only when you use them.

Elapsed time

00:00.00

Ready

Space start / pauseL lapR reset

Stopwatch settings 1/100 sec

Display precision

Session label

Timing reliability & session audit

Capture the current duration, state and projected finish, then run a short local clock-integrity check. This reads the existing timer controls; it does not replace the timer engine.

Configure the timing tool above, then refresh this audit.

Timing audit ready.

Core timing workflows

Start with a direct timer, stopwatch, alarm or focus workflow. Calendar, date arithmetic, clocks and scheduling specialists remain available from the full Date & Time hub.

All 76 date & time tools

Online TimerCountdown, sound, repeat & fullscreen StopwatchLaps, precision & fullscreen Countdown TimerFocused countdown workflow Alarm ClockAlarm at a local clock time PomodoroFocus and break cycles Interval TimerWork/rest rounds Presentation TimerTalk timing with warnings Classroom TimerProjector-friendly countdown

How to use the Online Stopwatch

Press Start or the Space key. Pause and resume from the same main button, press L to record a lap, and R to reset. The elapsed time stays visually dominant while lap history and settings remain secondary.

Lap timing

Each lap records both the split since the previous lap and the total elapsed time. Display precision can be changed without changing the underlying elapsed-time measurement.

Browser timing note

The stopwatch uses the browser performance clock while the page is open. Device sleep, browser suspension, or resource throttling can affect interactive updates, so it is not a certified timing instrument.