How accurate is the stopwatch?

It uses requestAnimationFrame and Date.now(), giving millisecond precision in modern browsers.

Can I record lap times?

Yes — press Lap while the stopwatch is running to record split times.

Stopwatch — Online with Lap Times

Free online stopwatch with start, stop, lap and reset. Accurate to milliseconds.

00:00.000

Embed this tool on your site

<iframe src="https://abracalc.com/time/stopwatch/embed.html" width="360" height="340" style="border:1px solid #e4e7ec;border-radius:12px" loading="lazy"></iframe>

How to use this tool

Open this page — it runs instantly in your browser, no signup or install.
Allow any permission prompt if asked; everything stays on your device.
Use the on-screen controls — results update live.

Free online stopwatch with start, stop, lap and reset. Accurate to milliseconds.

Frequently asked questions

How accurate is the stopwatch?: It uses requestAnimationFrame and Date.now(), giving millisecond precision in modern browsers.
Can I record lap times?: Yes — press Lap while the stopwatch is running to record split times.