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Date & Time

Stopwatch

Timing a run, a race, a plank, or a pizza? Hit start and the penguin counts every millisecond. Tap lap to freeze splits without stopping the clock.

00:00:00.000

hours : minutes : seconds . milliseconds

Lap times will appear here.

    Timing is measured with your device's high-resolution clock โ€” switching tabs won't lose a millisecond of elapsed time.

    How to use

    1. Press "Start". The clock begins counting immediately, down to the millisecond.
    2. Press "Pause" to freeze it. Press "Start" again to resume right where you left off.
    3. Tap "Lap" for splits. Each lap is recorded with its number and total elapsed time โ€” the clock keeps running.
    4. Press "Reset". Stops the clock and clears the display and all laps, ready for the next round.

    Frequently asked questions

    How accurate is this stopwatch?

    Elapsed time is measured with your device's high-resolution clock and displayed to the millisecond. The on-screen digits refresh as fast as your browser allows โ€” the underlying timing stays precise even if the display skips a frame here and there.

    Does it keep timing if I switch tabs?

    Yes. The stopwatch records a start timestamp and computes elapsed time from the system clock, so backgrounding the tab or switching apps doesn't lose time. Just come back and the display catches up instantly.

    How do lap times work?

    While the clock is running, press "Lap" to capture the current elapsed time as a numbered entry in the lap list. The stopwatch keeps running โ€” laps are just snapshots, perfect for tracking splits in a run or rounds in a workout.

    Can I time something longer than an hour?

    Absolutely. The display shows hours, minutes, seconds, and milliseconds, and it keeps counting as long as the page is open. Marathons, slow roasts, road trips โ€” go for it.

    Is my timing data sent anywhere?

    Never. Everything happens locally in your browser โ€” no uploads, no tracking, no storage. Your 4 AM plank record is safe with you.

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