How to use the online stopwatch

The online stopwatch measures elapsed time down to the millisecond after you click "Start". You can add laps at any time. Your current time and laps are saved automatically; if you time long periods, days will be shown as well.

Choose how precisely fractions of a second are displayed in the Accuracy setting.

Click "Start" or "Stop" to control the stopwatch. Click "Lap" to add the current value to the lap list. To clear laps and the value, click "Reset" (visible when stopped).

Customize appearance — text color, font, and size. Your preferences are saved and applied the next time you open the stopwatch.

For better visibility, switch to Fullscreen during presentations, workouts, or classes. Your time and laps are saved automatically, so you can close the page and resume later.