Online Stopwatch
Count up from zero to the hundredth of a second and record as many laps as you need. Each lap shows its own split and the running total, newest at the top.
The ring completes one sweep every minute, so you can read the seconds from across a room without squinting at the digits.
Space start/stop · L lap · R reset · F fullscreen
| Lap | Split | Total |
|---|
What people time with it
Running and swimming splits
Press L at every lap of the track or length of the pool. The split column shows straight away whether you are holding pace or fading.
How long things really take
Measure the commute, a load of laundry, or a code build instead of guessing. Real numbers make planning a day much easier.
Rehearsing a talk
Record a lap at each slide change. Afterwards the splits show exactly which section of the presentation runs long.
Keyboard first
Space starts and stops, L records a lap, R clears everything. No small buttons to aim for in the middle of a set.
Tips
- Laps are recorded only while the stopwatch is running. Stopping keeps them on screen so you can read them; R clears them.
- Fullscreen (F) shows large digits with your five most recent laps underneath.
- Elapsed time is measured from the system clock, so it stays correct in a background tab; the display catches up the moment you return.
Questions
What is the difference between split and total?
Here, Split is the time for that lap on its own and Total is the elapsed time when you pressed Lap. Coaches sometimes use “split” for the cumulative figure instead, which is why both columns are shown.
How accurate is a browser stopwatch?
The elapsed time is computed from the device clock rather than by counting ticks, so it does not drift over long runs. Your own reaction time when pressing a key, typically 0.15 to 0.25 seconds, is a far bigger source of error than the timer.
Are my laps saved anywhere?
No. Laps exist only in the open tab and vanish on reset or reload; they are never uploaded or saved.