Stopwatch
Online Stopwatch
Free online stopwatch to the hundredth: start, stop, record laps and resume. Fullscreen, no install.
Running
00:00
Sound
Display
Use cases
Sports and training
Measure your time on a set, a course or a drill, and compare results from one session to the next.
Lap splits
Record laps to break an effort down by segment and spot where your pace drops.
Work and productivity
Time a real task to estimate how long it takes and plan the next one more accurately.
Classroom and science
Precise timing for experiments, reading aloud or timed exercises in class.
FAQ
How accurate is the stopwatch?
To the hundredth of a second while the tab is active. Keep the page in the foreground for long measurements.
How do laps work?
The Lap button records a split without stopping the stopwatch, so you get the list of segments.
Lap time vs. total time?
Total time accumulates from the start; a lap measures the segment since the previous lap. For segment analysis, see the lap stopwatch.
Do I need to install anything?
No. The stopwatch runs in your browser, free and without an account.
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