Utilities

Online Stopwatch

Lap Timing

Stopwatch

00:00.00
Ready
Space start or pause   L lap   R reset   F fullscreen

Tool features

An accurate online stopwatch with laps, stats and export
4 features

Precise timing

Shows elapsed time to the hundredth of a second, measured against the system clock.

Laps and statistics

Record laps and see the fastest, slowest and average lap at a glance.

CSV export

Export every lap time to a CSV file for spreadsheets or training logs.

Shortcuts and fullscreen

Space to start or pause, L for a lap, R to reset, F for a distraction-free fullscreen view.

What is a stopwatch & how it works

Elapsed time, laps and splits

A stopwatch measures elapsed time from the moment you start it, and laps split that time into segments without stopping the clock: each lap records both its own duration and the running total.

This stopwatch runs entirely in your browser. It measures elapsed time from timestamps rather than counting ticks, and it reads the clock at the instant you press Pause or Lap, so the recorded time matches a watch started alongside it. Your laps stay on your device.

Lap time
The time since the previous lap was recorded.
Split / total
The overall elapsed time when the lap was recorded.
Average lap
Total lap time divided by the number of laps.

How to use this tool

Time anything with laps in four steps
1
Start
Click Start or press Space.
2
Record laps
Click Lap or press L each time you pass a checkpoint.
3
Pause or reset
Press Space to pause and resume, or R to reset to zero.
4
Review and export
Check the lap statistics and export them to CSV if you need a record.

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Frequently asked questions

Common questions about the stopwatch
5 Q&A

Yes. Elapsed time is calculated from the clock, not counted per tick, so the display is correct again as soon as you return to the tab. It also keeps running if you switch to the timer.

Space starts and pauses, L records a lap, R, Delete or Backspace resets, F toggles fullscreen and Esc leaves it.

Laps are kept in this browser tab, so they survive a reload but not closing the tab. Export them to CSV if you want to keep them.

The display shows hundredths of a second and elapsed time is measured against the system clock at the moment you press a button. For casual and training use it is more than precise enough; human reaction time adds more error than the timer.

Yes. Fullscreen mode shows a large, readable dial that suits workouts, classrooms and presentations, and keeps the screen awake while the stopwatch runs.