Stopwatch
Measure elapsed time and compare laps
Read total time and lap time correctly
Press Start as the activity begins. Use Lap to mark a checkpoint without stopping the clock, and Pause when you want to stop adding time. Resume continues the same measurement; Reset clears it for another attempt. Save any results you need before resetting.
A cumulative reading includes every lap since the start. If the first lap is recorded at 00:30.00 and the next at 01:05.00, the second segment took 00:35.00. Compare segment durations when judging individual laps, and the cumulative reading when checking the whole activity.
Keep results for a lesson or practice session
Copy or Share sends a readable result. CSV downloads a file with record, total_ms and segment_ms columns, so you can compare laps in a spreadsheet; the numeric durations are milliseconds. The elapsed row records the overall measurement, while lap rows also include a segment duration.
The classic stopwatch restores its saved measurement after navigation or refresh in the same browser. Clearing site data can remove it. Displayed hundredths do not turn a phone or browser into calibrated race equipment: tapping delay, screen updates and device scheduling affect what you see. For several people with one start and separate finishes, choose Multi-Stopwatch.
About this tool & help
Persistent elapsed timing, laps, exports and shared Multi-Stopwatch timing.
Your inputs stay on this device unless you deliberately share or export them.
Permissions and background limitations are explained honestly inside tools that need them.
How to use it
- Use Classic mode for laps and split analysis, or Multi-Stopwatch for individual player finishes.
- The classic stopwatch persists across OxClock navigation and browser refresh.
Common questions
What is the difference between total and lap time?
Total is elapsed time since Start; lap time is the interval since the previous lap.
How many competition players can I use?
Choose 3, 4, 5, 6 or 8 participants and edit every name.