How to use the stopwatch
Press Start to begin timing and Stop to pause. Press Resume to continue from where you stopped, or Reset to go back to zero. While it's running, press Lap to record a split. Each lap shows its own time and the total time so far, with the newest at the top.
Keyboard shortcuts
- Space: start or stop
- L: record a lap
- R: reset
Ideas for using a stopwatch
- Running and swimming: record each lap to see your pace.
- Practice and study: track how long you actually spend on a task.
- Speeches: time a run-through of your presentation.
- Experiments and games: measure reaction times or how long something takes.
Frequently asked questions
How accurate is the stopwatch?
It shows hundredths of a second and is based on your device's clock, so it stays accurate even in a background tab. Your reaction time pressing the button is usually the biggest source of error.
Will it keep running if I switch tabs?
Yes. Just don't close the tab.
Can I save my lap times?
Not yet. Copy them out or take a screenshot before you reset or close the page.