How precise is the stopwatch?

The stopwatch uses the browser's performance.now() API, which provides sub-millisecond resolution. The display shows time down to the millisecond, and the underlying timing is accurate to within a few microseconds on most devices.

What is the difference between lap time and split time?

Lap time is the duration since the previous lap button press—it measures how long that specific interval took. Split time (or cumulative time) is the total elapsed time from the start of the stopwatch to the moment you pressed lap. Both are displayed for each lap.

Does the stopwatch keep running if I close the tab?

No. The stopwatch runs in the browser tab and stops when the tab is closed. If you need to time something across sessions, use the countdown timer in date mode instead.

Can I export my lap times?

The current version displays lap times in the browser. You can copy the lap list manually or take a screenshot for your records.

Does pausing the stopwatch affect my recorded laps?

No. Pausing freezes the timer display but all previously recorded laps remain intact. When you resume, the timer continues from where it left off, and new laps will be recorded correctly.

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Online Stopwatch

An online stopwatch measures elapsed time with millisecond precision and records individual lap times. Each lap captures both the interval duration and the cumulative time, allowing you to compare performance across a timed session.

100% FreeNo Signup RequiredBrowser-BasedPrivate & Secure

What is Online Stopwatch?

A stopwatch is an online timing utility that measures elapsed time with high precision and records lap splits, displaying both the interval duration for each lap and the cumulative time since the start.

Complementary Tools

These tools work great alongside Online Stopwatch:

Countdown Timer Timezone Converter

Start Using Online Stopwatch Today

From training runs to cooking timers to software benchmarks, the online stopwatch gives you millisecond-precise timing with lap tracking that reveals how each interval compares. No app downloads, no accounts, no friction—just open the page and start timing. Record as many laps as you need and review them all in one scrollable list.

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