Chronometer

Simple stopwatch with lap and split tracking.

Chronometer

Ready

Laps

No laps recorded yet.

When to use Chronometer

Common ways to use Chronometer:

  • Time a workout interval

    Start the timer at the beginning of a workout set and check elapsed time when you finish.

  • Track meeting or session duration

    Measure how long a meeting, study session, or work block actually lasts.

  • Record lap splits for running or cycling

    Press Lap at each checkpoint to compare split times and monitor your performance.

  • Benchmark a manual task

    Time how long repetitive steps take to spot opportunities for speeding them up.

  • Measure time precisely without a stopwatch

    Use on any browser — no app, no download, millisecond precision included.

Chronometer FAQ

How do I use the chronometer?
Press Start to begin timing, use Lap to record splits while it runs, and press Stop to pause. Reset clears the timer and all recorded laps.
Does the chronometer save or upload my times?
The chronometer itself runs locally in your browser and does not save or upload timer or lap data. If you want to keep results, copy them or download the CSV yourself. Standard site analytics may still load on production pages.
What happens when I press Lap?
Each lap records both the split since the previous lap and the total elapsed time, so you can compare segments and overall pace.
Can I export or copy my lap data?
Yes. Use Copy laps to place the lap table on the clipboard or Download CSV to save the data as chronometer-laps.csv.
Do keyboard shortcuts work?
Yes. When focus is inside the chronometer, Space starts or stops the timer, L records a lap, and R resets the tool.