Online Stopwatch
Measure elapsed time, record split and total lap times, and export your results.
Elapsed time
Ready when you are
| Lap | Split time | Total |
|---|
How to use
- Start the watch; press Lap to capture a split.
- Pause and resume without losing elapsed time.
- Export the lap list or reset for another session.
A few things to know
Hundredths are a display resolution, not a measurement accuracy guarantee. Space toggles only when the stopwatch area has focus, outside input fields.
Keep the page open while timing an activity. If you return to the tab or reload, the saved time is used to catch up. Changes to the device clock while the page is hidden may affect the result.
Questions and answers
Does the hundredths display guarantee accuracy?
Hundredths are a display resolution, not a measurement accuracy guarantee. Space toggles only when the stopwatch area has focus, outside input fields.
What does a lap record?
A lap records the time since the previous lap and the total elapsed time. Pause keeps the elapsed time; Reset clears the current lap list, so export CSV first if you need it.
Technical references: Browser background-tab behavior (MDN)
Content updated: