What is the stopwatch precision?

Precise to milliseconds (0.001 seconds), with lap timing support. You can record each lap time and total time.

Will timing continue after closing the page?

No. The stopwatch stops when the page is closed. Keep the page open for long-duration timing.

EffiRoom

Stopwatch

Count up with millisecond precision and lap timing

Runs locally in your browser; input is never uploaded

Office Productivity

00:00.000

Millisecond precision

Shortcuts: Space start/pause, L lap, F fullscreen. Millisecond precision.

Usage

Stopwatch: counts up with millisecond precision and supports lap timing. Shortcuts: Space to start or pause, L to record a lap, F to toggle fullscreen. Runs entirely in your browser.

FAQ

1.
What is the stopwatch precision?
Precise to milliseconds (0.001 seconds), with lap timing support. You can record each lap time and total time.
2.
Will timing continue after closing the page?
No. The stopwatch stops when the page is closed. Keep the page open for long-duration timing.