Online stopwatch with laps
Precise stopwatch with hundredths of a second, pause, resume and lap recording, staying accurate even if you switch tabs.
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Laps
Laps you record will appear here.
An online stopwatch to measure elapsed time with hundredth-of-a-second precision, record laps, and pause and resume whenever you need to, all in your browser.
Elapsed time is calculated from the timestamp of the moment you pressed start, not by adding up ticks from an internal timer. That's why the result stays exact even if you switch tabs, minimize the browser, or your computer briefly slows down: when you come back, the stopwatch recalculates the real elapsed time instead of having drifted.
Use cases
- Measure lap times during athletics or cycling training.
- Time a presentation or an exam in segments.
- Measure how long a repetitive task takes to compare methods.
How it works
- 1
Start
Press "Start" to begin counting.
- 2
Record laps
Press "Lap" any time you want to log a split without stopping the stopwatch.
- 3
Pause or reset
Pause whenever you like and resume from the same point, or reset to go back to zero.
Frequently asked questions
Does it keep counting correctly if I switch tabs?
Yes. Elapsed time is always calculated from the moment you pressed start, not from a counter that can drift, so when you return to the tab you'll see the real elapsed time.
How many laps can I record?
There's no practical limit: the lap list scrolls inside its own box so it never breaks the page layout.
Are my laps saved if I reload the page?
No. Reloading the page resets the stopwatch to zero, just like a physical stopwatch.
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