Stopwatch

A simple stopwatch with start, pause, resume, lap, and reset controls.

Enter values

00:00:00

Elapsed time is calculated from timestamps rather than the number of display updates, reducing drift after the tab returns from the background.

Reloading the page clears the timer and laps. Use a dedicated timer as a backup for critical long-running measurements.

Does it keep running in the background?

The display may pause, but elapsed time is corrected from timestamps when you return.

Are laps saved?

No. Laps exist only while the page remains open.

Is the hundredth-of-a-second display official timing?

No. It is a browser-based estimate, not a certified sports timer.