Timing tips
For running, press L at each lap marker or kilometer sign; the list shows each split and the total, so you can see whether you started too fast. For a task you keep putting off, start the stopwatch and stop it when you are done: most people overestimate how long small chores take. Teachers use it for reading-speed checks and science experiments, and cooks for steps where a timer would need a guess. Keep the screen on with full screen mode if you need to glance at it.
Features
- Hundredths of a second, measured from the real clock.
- Lap times with the fastest lap in green and the slowest in red.
- Keyboard: space to start or stop, L for lap, R to reset.
- Keeps your time if you close and reopen the tab.
Uses
Running splits, swimming laps, cooking, experiments, speedruns and timing how long a task really takes.
FAQ
Does the stopwatch keep running if I switch tabs?
Yes. It measures from the real clock, so the time stays correct when the tab is in the background or the screen sleeps.
Is the stopwatch accurate?
It reads the browser's high-resolution clock, so it does not drift even in a background tab.
Are my laps saved?
Yes, in this browser until you press Reset.