Guides ·
How to use Stopwatch
Stopwatch. Online stopwatch with laps. It reads performance.now(), accurate to well under a millisecond; display is to 0.01 s.
The short answer
To use the online stopwatch, press Start (or the space bar), Lap to record split and lap times, and Stop to pause. Timing uses the browser's high-resolution monotonic clock to the hundredth of a second, and laps can be copied or downloaded.
It runs in your browser. What you enter is not uploaded.
How to use it
Type or paste your input into the Stopwatch.
Choose any options you need.
See the result update instantly.
Copy the result or download it.
Limits worth knowing
How accurate is it? It reads performance.now(), accurate to well under a millisecond; display is to 0.01 s.
What is the difference between lap and split time? Lap time is the time since the previous lap; split time is the total time since start.