A simple, accurate online stopwatch with lap times. Press Start, record laps as you go and stop when you are done.
How it works
The stopwatch records the time when you press Start and measures how much time has passed using your device clock, so it does not drift. Lap records the total time at that moment and the time since the previous lap. Stop pauses it, and Start continues from where it stopped. Reset clears everything.
Example
Press Start, press Lap at each lap of a run, and read each lap time and the running total in the list.
Frequently asked questions
How accurate is the stopwatch?
It shows hundredths of a second and uses your device clock. Small delays in your browser can add tiny errors, so it is fine for everyday timing but not for official timing.
Can I record laps?
Yes. Press Lap and each split appears below.
Does it keep running in another tab?
Yes. It works from the clock, so the elapsed time stays correct.
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For everyday use. Not suitable for official timing.