Online Stopwatch
Precise timing down to a hundredth of a second, with lap recording. Laps are saved in your browser even if you refresh the page.
Stopwatch vs. timer — what's the difference?
A stopwatch counts up from zero — perfect for timing a run, a workout or a task. A timer counts down from a duration you set and rings when it ends. If you need a countdown with an alarm, switch to our online timer.
Recording laps
Pressing 'Lap' while the stopwatch is running records the current time without stopping the measurement — so you can time each loop of a track or each set of a workout separately. The table shows both the individual lap time and the cumulative total.
Measurement accuracy
The stopwatch uses the browser's monotonic clock (performance.now), which is unaffected by system clock changes — so your measurement stays accurate even if your computer's clock updates mid-run.