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Stopwatch Online — Free Lap Timer with Hundredths

Free online stopwatch with laps and hundredths of a second. Space starts/stops, L records a lap, R resets. Highlights fastest/slowest laps, copy as CSV.

Convert in your browser · No sign-up

00:00.00

Space stopwatch.keyStartStop · L stopwatch.keyLap · R stopwatch.keyReset

How to use

  1. Press Start or the Space bar to begin timing.
  2. Press Lap or L to record a lap; the table shows each lap time and the total split time, with the fastest and slowest laps highlighted.
  3. Press Stop (Space) to pause, then Reset (R) to clear, or copy the laps as text or CSV.

Example

Laps pressed at 00:41.20, 01:20.95, 02:03.10
→ Lap 1 00:41.20 · Lap 2 00:39.75 (fastest) · Lap 3 00:42.15 (slowest)

Details and limitations

Time is measured with the browser's high-resolution clock (performance.now), so it stays accurate even if the display updates less often in a background tab.

Everything runs in your browser; laps are not saved or uploaded, so copy or download them before closing the page.

FAQ

What keyboard shortcuts does the stopwatch support?

Space starts and stops, L records a lap while running, and R resets when stopped. Shortcuts are ignored while you type in a text field.

What is the difference between lap time and split time?

Lap time is the duration of that lap alone; split time is the total elapsed time when the lap was recorded.

Can I export my lap times to a spreadsheet?

Yes. Copy as CSV or Download CSV gives lap number, lap time, split time and the same values in milliseconds.

Format references

Tool page updated: