Stopwatch & Timer
Free online stopwatch with lap times and countdown timer with circular progress
About Stopwatch & Timer
This tool includes two modes. The Stopwatch measures elapsed time with centisecond precision and supports unlimited lap recording — useful for workouts, cooking, sports, or any timed activity. The Countdown Timer lets you set hours, minutes, and seconds, then counts down to zero with a circular progress indicator and a visual alert when time is up. Everything runs in your browser with no installation required.
FAQ
- How accurate is the stopwatch?
- The stopwatch uses requestAnimationFrame and the browser's Date.now() API, giving centisecond (0.01s) display precision. Actual timing accuracy depends on your device and browser but is typically within a few milliseconds.
- Can I record lap times?
- Yes. While the stopwatch is running, click the Lap button to record the current elapsed time. All laps are shown in reverse order (most recent first) below the display.
- Does the timer continue if I switch tabs?
- Yes. The timer is based on absolute timestamps (Date.now()), so it continues counting even if you switch tabs or minimize the browser. The display will catch up when you return.
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