How to Use Stopwatch

About this tool

Measure elapsed time and record lap intervals in the browser.

How to use Stopwatch

1. Click Start, or use Space when the timer controls have focus as intended.
2. Use Lap or L to record a split while the stopwatch runs.
3. Pause to inspect times and use Reset or R when you are ready to clear the session.

Worked example

Record a lap at the end of each practice run to compare intervals.

Will it behave like a dedicated timing device in the background?

Browser scheduling, sleeping devices and tab lifecycle can affect timing or display updates. Do not use it for precision-critical measurement.

Does Reset preserve laps?

Reset clears the current timing session. Copy any values you need before resetting or leaving the page.

Put this guide into practice

• Stopwatch — A precise online stopwatch with lap times.