Online Stopwatch

Track time and laps with an online stopwatch

This simple stopwatch counts up from zero with a lap button to mark an intermediate split without stopping the running total. Use it for training intervals, brewing times, science experiments, and speeches, or anything you want to measure to the tenth of a second.

1. Tap the arrow or press the space bar to begin the count.
2. Click the flag to mark a split while the clock keeps running.
3. Use pause and reset to control the stopwatch when running.

Track times and stay on schedule

A stopwatch makes it easy to see how long something took. An online version works across devices, so you can use it on your phone on a morning run or on your laptop if you're practicing or pacing your presentation.

Related tools

• The online timer counts down from a specified duration.
• The chess clock runs two stopwatches (no laps) for turn-taking in chess or other games.

Common questions

Will I lose my laps if I refresh the page?

No. The elapsed time and lap list are saved in this browser and will reload with the page.

What's the smallest unit it tracks?

Tenths of a second (0.1 s). Smaller intervals are hard to read live, and the timing of your finger press dwarfs the difference anyway.

Can I copy the lap list as text?

Yes. Highlight the table and copy. The values land in your clipboard in the same order you saw them.