Online Stopwatch
Start, pause and record laps with 1/100-second resolution. Your lap list shows each split and highlights the fastest and slowest.
Ready
Laps
Press Lap while running to record split times.
How to use it
- Press Start (or Space) to begin timing.
- Press Lap (or L) to record a split without stopping the clock.
- Pause to freeze the time, Resume to continue, and Reset to clear everything.
Good for
Running and swimming laps
Record each lap and spot where your pace dropped.
Speeches and rehearsals
See exactly how long each section of a talk takes.
Experiments and chores
Time a reaction, a process or how long a task really takes.
Frequently asked questions
How accurate is the stopwatch?
It reads your device clock on every frame and displays hundredths of a second. Elapsed time is computed from timestamps, not by counting ticks, so it does not drift when the tab is in the background.
Are my laps saved?
Laps are kept on this page while it is open. Reloading the page or pressing Reset clears them.
Which keyboard shortcuts are available?
Space starts or pauses, L records a lap, R resets, F toggles full screen.