Online Stopwatch
Press Start and the clock runs to hundredths of a second. Lap records a split without stopping the count.
How to use
Start begins the count, Stop pauses it, and pressing Start again resumes from the same place. Lap records the current time in the list below and shows how long has passed since the previous split — handy for interval training.
The stopwatch reads the system clock instead of adding up ticks. That matters: when you switch tabs, browsers throttle timers to save power, and a naive stopwatch would fall minutes behind over an hour. This one shows the right time when you come back.
FAQ
Does it keep running if I switch tabs?
Yes. The elapsed time is derived from the system clock, so when you return you will see the correct value even though the browser paused screen updates.
How many laps can I record?
As many as you like — the list is not capped. Each lap shows both the total time and the gap from the previous lap.
Are my times saved if I reload the page?
No. Reloading clears the count and the laps. The stopwatch is meant as a quick, in-the-moment tool.
Do I need an internet connection while it runs?
No. The page loads once, then everything is computed in your browser.